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Auersperg, Alice M. I.; Szabo, Birgit; von Bayern, Auguste M. P.; Bugnyar, Thomas (2014). Object permanence in the Goffin cockatoo (Cacatua goffini). Journal of comparative psychology, 128(1), pp. 88-98. American Psychological Association 10.1037/a0033272
Auersperg, Alice M.I.; Szabo, Birgit; von Bayern, Auguste M.P.; Kacelnik, Alex (2012). Spontaneous innovation in tool manufacture and use in a Goffin’s cockatoo. Current Biology, 22(21), R903-R904. Cell Press 10.1016/j.cub.2012.09.002
