Torsten Eymann Michael Reinicke Werner Streitberger Omer F. Rana Liviu Joita Dirk Neumann Björn Schnizler Daniel Veit Oscar Ardaiz Pablo Chacin Isaac Chao Felix Freitag Leandro Navarro Michele Catalano Mauro Gallegati Gianfranco Giulioni Rubén Carvajal-Schiaffino Floriano Zini Catallaxy-based Grid markets. 297-307 2005 1 Multiagent and Grid Systems 4 http://iospress.metapress.com/content/9d4efput2p7h67a1/ db/journals/mags/mags1.html#EymannRSRJNSVACCFNCGGCZ05