Andreas Flache Rainer Hegselmann Do Irregular Grids make a Difference? Relaxing the Spatial Regularity Assumption in Cellular Models of Social Dynamics. 2001 4 J. Artificial Societies and Social Simulation 4 http://jasss.soc.surrey.ac.uk/4/4/6.html db/journals/jasss/jasss4.html#FlacheH01