 | Nicholson, D., 2011. What's Gnu? - (Black) rhinoceros breeding update. Alive (Zoological Society of Milwaukee County) 31 (1) Winter: front cover, 14, 2 images
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 | Kolker, J.; Nicholson, D., 2007. Pachyderm personality pack (Mimi the Black rhino and Ruth the African elephant). Alive (Zoological Society of Milwaukee County) 27 (3) Fall: 15, 2 images
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 | Nicholson, D., 1997. Results of an effective conditioning program for rhinos. Animal Keeper's Forum 24 (11): 492-493
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 | Nicholson, D., 1996. Conditioning unrestrained Black rhinoceros (Diceros bicornis) for venipuncture. Animal Keeper's Forum 23 (9): 501-507, 4 plates
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 | Nicholson, D., 1996. What's Gnu? - Black rhino born January 1, 1996. Alive (Zoological Society of Milwaukee County) 16 (2) Spring: 19, 1 image
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 | Nicholson, D., 1995. On the job - Preventive health care for the animals . Alive (Zoological Society of Milwaukee County) 15 (3) Summer: 6-7, 2 images
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