Meng, X; Fan, L; Liu, J; Wang, T; Yang, J; Wang, J; Wang, S; Ye, Z (2013). "Fresh semen quality in ejaculates produced by nocturnal emission in men with idiopathic anejaculation". Fertility and Sterility. 100 (5): 1248–52. doi:10.1016/j.fertnstert.2013.07.1979. PMID23987518.
Hovav, Y; Dan-Goor, M; Yaffe, H; Almagor, M (1999). "Nocturnal sperm emission in men with psychogenic anejaculation". Fertility and Sterility. 72 (2): 364–5. doi:10.1016/s0015-0282(99)00239-3. PMID10439013.
measuredhs.com
"Knowledge about Human Reproduction and Experience of Puberty"(PDF). Indonesia Young Adult Reproductive Health Survey 2002–2003. Badan Pusat Statistik (BPS-Statistics Indonesia), Jakarta, Indonesia; National Family Planning Coordinating Board, Jakarta, Indonesia; Ministry of Health, Jakarta, Indonesia, ORC Macro, Calverton, Maryland, U.S. hlm. 27. Diakses tanggal April 7, 2011.
Meng, X; Fan, L; Liu, J; Wang, T; Yang, J; Wang, J; Wang, S; Ye, Z (2013). "Fresh semen quality in ejaculates produced by nocturnal emission in men with idiopathic anejaculation". Fertility and Sterility. 100 (5): 1248–52. doi:10.1016/j.fertnstert.2013.07.1979. PMID23987518.
Hovav, Y; Dan-Goor, M; Yaffe, H; Almagor, M (1999). "Nocturnal sperm emission in men with psychogenic anejaculation". Fertility and Sterility. 72 (2): 364–5. doi:10.1016/s0015-0282(99)00239-3. PMID10439013.