| Schaffer, N.E.; Bryant, W.; Agnew, D.; Meehan, T.; Beehler, B., 1998. Ultrasonographic monitoring of artificially stimulated ejaculation in three rhinoceros species (Ceratotherium simum, Diceros bicornis, Rhinoceros unicornis). Journal of Zoo Animal Medicine 29 (4): 386-393, figs. 1-5, tables 1-2
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| Berkeley, E.V.; Kirkpatrick, J.F.; Schaffer, N.E.; Bryant, W.M.; Threlfall, W.R., 1997. Serum and fecal steroid analysis of ovulation, pregnancy, and parturition in the black rhinoceros (Diceros bicornis). Zoo Biology 16 (2): 121-132, figs. 1-4, tables 1-2 - https://doi.org/10.1002/(SICI)1098-2361(1997)16:2<121::AID-ZOO3>3.0.CO;2-C
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| Schaffer, N.E., 1996. Manual for chute design for the rhinoceros. Coimbatore, Zoo Outreach Organisation, pp. 1-38
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| Schaffer, N.E.; Jeyendran, R.; Beehler, B., 1993. Reproductive procedures and restraint for rhinoceroses: pp. 153-159, figs. 1-3, table 1
| In: Ryder, O.A. Rhinoceros biology and conservation: Proceedings of an international conference, San Diego, U.S.A. San Diego, Zoological Society: pp. i-v, 1-368 |
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| Schaffer, N.E.; Beehler, B.A., 1990. Preliminary studies on the anatomy and ultrasonic images of the reproductive structure of three species of rhinoceros (Rhinoceros unicornis, Diceros bicornis, Ceratotherium simum). Proceedings of the American Association of Zoo Veterinarians 1990: 242-248, 2 figures, 1 table
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| Schaffer, N.E.; Beehler, B.A., 1988. Overview of procedures and results of semen collection from ambulatory rhinoceroses. Proceedings of the AAZPA Annual Conference 1988: 273-279, tables 1-5
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| Schaffer, N.E.; Beehler, B.A., 1988. Comparison of semen collection methods in an ambulatory Indian rhinoceros (Rhinoceros unicornis) [Abstract of poster session]: p. 649
| In: Dresser, B. et al. Proceedings of the 5th Internatioinal Conference on breeding endangered species in captivity. Cincinnati, Zoo and Botanical Garden: pp. i-xii, 1-722 |
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