Pauline Jepp Jörg Denzinger Brian Wyvill Mario Costa Sousa Using Multi-agent Systems for Sampling and Rendering Implicit Surfaces. 255-262 2008 SIBGRAPI http://dx.doi.org/10.1109/SIBGRAPI.2008.18 conf/sibgrapi/2008 db/conf/sibgrapi/sibgrapi2008.html#JeppDWS08