Lameira, A. R., Hardus, M. E., Nouwen, K. J. J. M., Topelberg, E., Delgado, R. A., Spruijt, B. M., . . . Wich, S. A. (2013). Population-Specific Use of the Same Tool-Assisted Alarm Call between Two Wild Orangutan Populations (Pongopygmaeus wurmbii) Indicates Functional Arbitrariness. Public Library of Science.

Lameira, Adriano R., Madeleine E. Hardus, Kim J. J. M. Nouwen, Eva Topelberg, Roberto A. Delgado, Berry M. Spruijt, Elisabeth H. M. Sterck, Cheryl D. Knott, and Serge A. Wich. Population-Specific Use of the Same Tool-Assisted Alarm Call between Two Wild Orangutan Populations (Pongopygmaeus Wurmbii) Indicates Functional Arbitrariness. Public Library of Science, 2013.

Lameira, Adriano R., et al. Population-Specific Use of the Same Tool-Assisted Alarm Call between Two Wild Orangutan Populations (Pongopygmaeus Wurmbii) Indicates Functional Arbitrariness. Public Library of Science, 2013.