0015–5713/98/0692–0106$15.00/0 E-Mail karger@karger.ch Fax+ 41 61 306 12 34 This article is accessible online at: http://www.karger.ch http://BioMedNet.com/karger Prof. Elke Zimmermann Institute of Zoology, Tierarztliche Hochschule Hannover Bunteweg 17, D–30559 Hannover (Germany) Tel. 0511 953 8740, Fax 0511 953 8586 E-Mail ezimmer@zoologie.tiho-hannover.de Received: December 5, 1996 Accepted: January 3, 1997 Folia Primatol 1998;69:106–114 Brief Report
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Zimmermann et al. (1998) studied this question.