César A. Marín Iain Duncan Stalker Nikolay Mehandjiev Business Ecosystem Modelling: Combining Natural Ecosystems and Multi-Agent Systems. 181-195 2007 conf/cia/2007 CIA http://dx.doi.org/10.1007/978-3-540-75119-9_13 db/conf/cia/cia2007.html#MarinSM07