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[4] Shoupe, D. “Barrier Contraceptives: Male Condoms, Vaginal Spermicides, and Cervical Barrier Methods.” The Handbook of Contraception: A Guide for Practical Management, 2016, eknygos.lsmuni.lt/springer/677/147-177.pdf . Accessed August 2023.
[5] “Drug facts: Today Vaginal Contraceptive – Nonoxynol-9 Sponge.” Mayer Laboratories Inc, 2018, dailymed.nlm.nih.gov/dailymed/getFile.cfm?setid=6b4e54d7-6ba8-4400-bd52-75d112e6fe50&type=pdf&name=6b4e54d7-6ba8-4400-bd52-75d112e6fe50 . Accessed August 2023.