case-report 1991 Retrograde ejaculation and pronuclear stage tubal transfer (PROST) Archives of andrology ·doi:10.3109/01485019108987621
article 1990 Gamete intrafallopian transfer as treatment for infertility associated with endometriosis Fertility and Sterility ·doi:10.1016/s0015-0282(16)53593-6