@article{Dufwenberg_2004,
title={A theory of sequential reciprocity},
volume={47},
ISSN={0899-8256},
url={http://dx.doi.org/10.1016/j.geb.2003.06.003},
DOI={10.1016/j.geb.2003.06.003},
number={2},
journal={Games and Economic Behavior},
publisher={Elsevier BV},
author={Dufwenberg,
Martin and Kirchsteiger,
Georg},
year={2004},
month=may,
pages={268–298} }