Journal of Urology (mentioned in 2011)
Journal of Sexology 2006
https://www.surveymonkey.com - 2015
University Agostinho Neto 2001
Journal of Urology 2013
Ուրոլոգիայի Առողջության  Պահպանման Ծառայություն Armenia - 2015
Smith et al. 1998 Does penis size influence condom slippage and breakage?
https://www.surveymonkey.com - 2015
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
https://www.surveymonkey.com - 2015
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
Journal of Urology (mentioned in 2011)
Universitair Ziekenhuis Antwerpen - 2015
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
Genital size measure survey 2015
Sociedad Boliviana de Urología - 2015
Genital size survey 2015 (http://genitalsize.com)
Pedro N. Gabrich; Juliana S. P. Vasconcelos; Ronaldo Damião; Eloísio A. da Silva 2007
Tomova A et all. 2010 Growth and development of male external genitalia (17 to 19)
Genital size survey 2015 (http://genitalsize.com)
Keith Habersberger, Los Angeles, BuzzFeed Motion Pictures - 2015
https://www.surveymonkey.com - 2015
African Journal of Urology 2003
Siminoski K. et all. The relationships among height, penile length, and foot size. Ann Sex Res 1993
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
African Journal of Urology 1998
Central Hospital of N'Djaména  1989
Otero Andrade. Fabio. 2008 Universidad de Chile. Dpt. de Urologia. 1998
Chen XB. Li RX. Yang HN. Dai JC. 2014
18 year's old Military survey. Otero Andrade. Fabio E. y Cajigas Plata. Jaime Andrés. Bogo. 2008
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
Journal of Urology, Revised 2015
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
https://www.surveymonkey.com - 2015
Journal of Sexology 2002
Genital size measure survey 2015
Internacionalizaci Univerzity v Praze. 2001
University of Copenhagen - Urological Research Center and Andrology 2015
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis lengthand circumference and r-K life history theory in 113 populations
l’Universite Kongo / Mbanza-Luvaka. 1997
University of Guayaquil, Ecuador- Dr. Cesar Cabezas Tamayo Guayaquil. 2013
Shalaby ME. Almohsen AE. El Shahid AR. Abd Al-Sameaa MT. Mostafa T. 2014
Centro integral de urologia, Universidad Evangélica de El Salvador, 2015
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
Ethiopian Military health documention database (Extracted on 11 january 1980)
Helsinki University Central Hospital - 2015
Paris National Academy of Surgery (l'Academie nationale de chirurgie) 2011
https://www.surveymonkey.com - 2015
Genital size survey 2015 Everyoneweb measurement
Schneider T.. Sperling H. Lümmen G. Syllwasschy J. Rübben H. 2001
Noguchi Memorial Institute for Medical Research (NMIMR) 2001
Spyropoulos E.. Borousas D. Mavrikos S. Dellis A. Bourounis M. Athanasiadis S.
Genital size survey 2012 (http://genitalsize.com)
Longitud y grosor del pene - Hospital General de Enfermedades. Instituto Guatemalteco de Seguridad Social
Genital size measure survey 2015
https://www.surveymonkey.com - 2015
Genital size measure survey 2015
Estudio: Datos sobre el pene , El Heraldo Junio 2015 tag/715212-213
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
https://www.surveymonkey.com - 2015
Krause. Jan Vinzenz. 2008 Institut fur Kondom Beratung
K Promodum et al.; Penile length and circumference: an Indian study 2007
Universitas Indonesia. Laporan Hasil Penelitian.
Mehraban D1. Salehi M. Zayeri F. 2007
Issam S. Al-Azzawi - Arab Association of Urology- 2015
NUI Galway/NUIG/UCG Ireland. 1999.
Study conducted with 55 Israeli men 21 -78 Sepkowitz Research. 2005
Ponchietti R. Mondaini N. Bonafè M. Di Loro F. Biscioni S. Masieri L. 2001
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
Dr. Nakajima. soldiers research. Japanese Journal of Sexology
Awwad Z. Abu-Hijleh M. Basri S. Shegam N. Murshidi M. Ajlouni K.
https://www.surveymonkey.com - 2015
https://www.surveymonkey.com - 2015
Genital size measure survey 2015
Military General Hospital 1956  Korean Urol J. 203
Journal of Urology 1998. Seoul. Korea.
Dr. A. Kandari - Al Seef Hospital 2015
Genital size measure survey 2015
Krause. Jan Vinzenz. 2009 Institut fur Kondom Beratung
Rafik Hariri University Hospital Researchm. 2007.
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
Krause. Jan Vinzenz. 2009 Institut fur Kondom Beratung
Krause. Jan Vinzenz. 2009 Institut fur Kondom Beratung
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
Centro de andrologia - Universidad Veracruzano - Gerardo Ortiz - 2015
Genital size measure survey 2015
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
Genital size measure survey 2015
Ibn Sina University Hospital Rabat - 2015
Genital size measure survey 2015
Grande International Hospital,  Health Organization/ Association 2015
Onderzoekscentrum i.o.v. NIBI Nederland. Utrecht 2013
Genital size measure survey 2015
https://www.surveymonkey.com - 2015
Gerofi et al.. 2000
Norwegian Social Science Data Service (NSD) 2002
https://www.surveymonkey.com - 2015
Sindh Institute information 2015 Karachi Pakistan
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
https://www.surveymonkey.com - 2015
Genital size measure survey 2015
de Zarate G 1993
https://www.surveymonkey.com - 2015
Genital size survey 2012 (http://genitalsize.com)
https://www.surveymonkey.com - 2015
Pereira N. Estudo do tamanho do pénis na população portuguesa. Rev Int Androl. 2004
Shamsodini et all. Complications of penile augmentation ... Silicone (Doha 2012)
Mario De Siati, Oscar Selvaggio et all. 2015
Presidential hospital of Russia, Moscow, Russia 2015
Genital size measure survey 2015
Dr. Mohamed Habos. Masculine Genitals Behavior and Disease Clinic 2010
Khan et al. 2012 Establishing a reference range for penile length in Caucasian British men: a prospective study of 609 men
Teunis 2001
https://www.surveymonkey.com - 2015
King Chien Joe Lee, Gerald B. Brock -Dept. of Urology, National University Hospital, Singapore 2015
Genital size measure survey 2015
http://tvnoviny.sk/zeny/top-tema/na-velkosti-penisu-zalezi-vieme-aky-zho-maju-slovaci.html
https://www.surveymonkey.com - 2015
Genital size measure survey 2015
The South African Department of Health (Facts and Statistics)
Dr. Pilar Cristobal: Universida de Navarra. 2003.
Dr. Neville D Perera - General Hospital of Colombo- 2015
https://www.surveymonkey.com - 2015
The PAHO/WHO Representative Paramaribo. 2004
Krause. Jan Vinzenz. 2008 Institut fur Kondom Beratung + Statistika Centralbyran. Sweden. 2015
https://www.surveymonkey.com - 2015
Chuang et all (2003)
Chrouser et al. (2013) Penile Measurements in Tanzanian Males: Guiding Circumcision Device Design and Supply Forecasting
Faculty of Medicine. Siriraj Hospital. Mahidol University. Bangkok. 2013
Genital size measure survey 2015
Genital size measure survey 2015
Hospital of Sahloul (Sousse-Tunisia) 2015
Aslan et al. 2011 and H Söylemez. et al. 2011 and  Sengezer et al. 2002
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
https://www.surveymonkey.com - 2015
https://www.surveymonkey.com - 2015
Khan S. Somani B.. Lam W. Donat R. 2012
Herbenick D.. Reece M. Schick V. Sanders SA. 2013
https://www.surveymonkey.com - 2015
Genital size measure survey 2015
D’Empaire. Prof. Gabriel Universidad de Venezuela. 1998
Vietnam Urology- Dr. N.B. Trieu (VUNA), Hanoi, Vietnam 2015
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length
Lynn et al.. 2012. An examination of Rushton’s theory of differences in penis length