1. Black rhinoceros (Diceros bicornis) in U.S. zoos: II. behavior, breeding success, and mortality in relation to housing facilities
2. HISTORY IN SOUND AND LIGHT
3. Fraser J. S.Hall J.Mellen andD.Shepherdson.2000.Response of Zoo Animals to Air Blast and Ground Vibration Resulting from Tri-Met Light Rail Tunnel Construction. Oregon Zoo ~ Metro January 2000. Retrieved fromhttps://www.academia.edu/21189192/Response_of_zoo_animals_to_air_blast_and_ground_vibration_resulting_from_Tri-Met_light_rail_tunnel_construction.
4. Music Under Glass: New Approaches to the Exhibition of Sound-Producing Instruments