Robert Martens Raman Paranjape Luigi Benedicenti S. Sankaran Anguraj Sadanand Mobile agent strategies for the provision of public goods: An experimental study. 140-146 2006 5 Electronic Commerce Research and Applications 2 http://dx.doi.org/10.1016/j.elerap.2005.10.008 db/journals/ecra/ecra5.html#MartensPBSS06