Page, J.E.; Huffman, M.A.; Smith, V.; Towers, G.H.N. 1997. Chemical basis for Aspilia leaf-swallowing by chimpanzees: A reanalysis. Journal of Chemical Ecology. 23(9): 2211-2226.

Page, J.E.; Huffman, M.A.; Smith, V.; Towers, G.H.N. 1997. Chemical basis for Aspilia leaf-swallowing by chimpanzees: A reanalysis. Journal of Chemical Ecology. 23(9): 2211-2226.