Number of items: 1.
Centorrino, Samuele
, Djemaï, Elodie
, Hopfensitz, Astrid
, Milinski, Manfred and Seabright, Paul
(2015)
A model of smiling as a costly signal of cooperation opportunities.
Adaptive Human Behavior and Physiology, vol. 1.
pp. 325-340.

Up a level