@phdthesis{Nitsch2004,
author = {Nitsch, Marianne},
year = {2004},
title = {Social Behavioral Dynamics and Captive Management of All-male Groups of
Western Lowland Gorillas (Gorilla gorilla gorilla) in European Zoos},
type = {Dissertation},
url = "http://dx.doi.org/10.17169/refubium-8166",
}