Sutter, Matthias Max Planck Institute for Research on Collective Goods, Max Planck Society;
https://doi.org/10.1016/S0165-1765(01)00544-4 (Any fulltext)
Güth, W., Kocher, M., & Sutter, M. (2002). Experimental ‘beauty contests’ with homogeneous and heterogeneous players and with interior and boundary equilibria. Economics Letters, 74, 219-228.