Spagnolo, A. G., A. Mancini, L. De Marinis, D. Chiarenza, C. Le Pera, M. L. Di Pietro, E. Giacchi, and G. Pompa. 1993. “The Scientific and Ethical Evaluation of a Method [or the Diagnostic Sampling of Human Seminal Fluid”. Medicina E Morale 42 (6):1189-1203. https://doi.org/10.4081/mem.1993.1037.