Chimpanzee mothers, but not fathers, influence offspring vocal–visual communicative behavior
Joseph G. Mine, Laura C. Dees, C. Wilke, Erik P. Willems, Z. Machanda, Martin N. Muller, M. Emery Thompson, R. Wrangham, Erik J Scully, Kevin Langergraber, Sabine Stoll, K. Slocombe, S. W. Townsend
PLoS Biology