Waldinger, M.D., Quinn, P., Dilleen, M., Mundayat, R., Schweitzer, D.H., & Boolell, M. (). „A Multinational Population Survey of Intravaginal Ejaculation Latency Time”. Journal of Sexual Medicine. 2 (4): 492–497. doi:10.1111/j.1743-6109.2005.00070.x. PMID16422843.Mentenanță CS1: Nume multiple: lista autorilor (link)
Giuliano, F., Patrick, D., Porst, R., La Pera, G., Kokoszka, A., Merchant, S., Rothman, M., Gagnon, D., & Polverejan, E. (). „Premature Ejaculation: Results from a Five-Country European Observational Study”. European Urology. 53 (5): 1048–1057. doi:10.1016/j.eururo.2007.10.015. PMID17950985.Mentenanță CS1: Nume multiple: lista autorilor (link)
Bolen, J. G., (). „The male orgasm: pelvic contractions measured by anal probe”. Archives of Sexual Behavior. 9 (6): 503–21. doi:10.1007/BF01542155. PMID7458658.Mentenanță CS1: Nume multiple: lista autorilor (link)
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Waldinger, M.D., Quinn, P., Dilleen, M., Mundayat, R., Schweitzer, D.H., & Boolell, M. (). „A Multinational Population Survey of Intravaginal Ejaculation Latency Time”. Journal of Sexual Medicine. 2 (4): 492–497. doi:10.1111/j.1743-6109.2005.00070.x. PMID16422843.Mentenanță CS1: Nume multiple: lista autorilor (link)
Giuliano, F., Patrick, D., Porst, R., La Pera, G., Kokoszka, A., Merchant, S., Rothman, M., Gagnon, D., & Polverejan, E. (). „Premature Ejaculation: Results from a Five-Country European Observational Study”. European Urology. 53 (5): 1048–1057. doi:10.1016/j.eururo.2007.10.015. PMID17950985.Mentenanță CS1: Nume multiple: lista autorilor (link)
Bolen, J. G., (). „The male orgasm: pelvic contractions measured by anal probe”. Archives of Sexual Behavior. 9 (6): 503–21. doi:10.1007/BF01542155. PMID7458658.Mentenanță CS1: Nume multiple: lista autorilor (link)
Rehan N, Sobrero AJ, Fertig JW. (). „The semen of fertile men: statistical analysis of 1300 men”. Fertility and Sterility. 26 (6): 492–502. PMID1169171.Mentenanță CS1: Nume multiple: lista autorilor (link)