1. Colahan, H., Mangold, B. & Philipp, C. (2001, May). Matters of the heart: Managing cardiomyopathy in a male gorilla. In The apes: Challenges for the 21st century conference Proceedings, 2000 (p. 366). Brookfield, IL: Chicago Zoological Society.
2. Gorilla husbandry training for assisted reproduction at Disney's Animal Kingdom. (2002). [Videotape]. Lake Buena Vista, FL: Disney's Animal Kingdom. [Available from Hollie Colahan, Disney's Animal Kingdom, P.O. Box 10000, Lake Buena Vista, FL 32830]
3. Philosophy of environmental enrichment: Past, present, and future
4. Philipp, C., Breder, C. & MacPhee, M. (2001, May). Maternal care and infant training of a western lowland gorilla (Gorilla gorilla gorilla). In The apes: Challenges for the 21st century conference Proceedings, 2000 (pp. 135-136). Brookfield, IL: Chicago Zoological Society.
5. Richards, B., Owen, L., Mullins-Cordier, S. & Sellin, R. (2001, May). The lesser known ape: Husbandry training with gibbons and siamangs. In The apes: Challenges for the 21st century conference Proceedings, 2000 (pp. 107-111). Brookfield, IL: Chicago Zoological Society.