@article{Chli_DeWilde_Exchange,
 	author = {M. Chli and P. {De Wilde}},
 	title = {The emergence of knowledge exchange: an agent-based model of a software market},
 	journal = {IEEE Transactions in Systems, Man and Cybernetics, Part A},
 	year = {2008},
 	volume = {38},
 	number = {5},
	pages = {1056--1068}
 }