Palermo, G.; Joris, H.; Devroey, P.; Van Steirteghem, A. C.. (1992-07-04). «Pregnancies after intracytoplasmic injection of single spermatozoon into an oocyte» Lancet 340 (8810): 17–18. doi:10.1016/0140-6736(92)92425-F. ISSN0140-6736. PMID1351601..
nih.gov
ncbi.nlm.nih.gov
Palermo, G.; Joris, H.; Devroey, P.; Van Steirteghem, A. C.. (1992-07-04). «Pregnancies after intracytoplasmic injection of single spermatozoon into an oocyte» Lancet 340 (8810): 17–18. doi:10.1016/0140-6736(92)92425-F. ISSN0140-6736. PMID1351601..
worldcat.org
Palermo, G.; Joris, H.; Devroey, P.; Van Steirteghem, A. C.. (1992-07-04). «Pregnancies after intracytoplasmic injection of single spermatozoon into an oocyte» Lancet 340 (8810): 17–18. doi:10.1016/0140-6736(92)92425-F. ISSN0140-6736. PMID1351601..