W. B. Foxworth, E. Carpenter, D. C. Kraemer and A. B. Kier. "Nonsurgical and nonlethal retrieval of mouse spermatozoa." Laboratory animal science Vol. 46 Iss. 3 (1996) p. 352 - 354 ISSN: 00236764
Available at: http://works.bepress.com/william-foxworth/6/