Mark de Berg Fred van Nijnatten Bettina Speckmann Kevin Verbeek Rectangular cartograms: the game. 96-97 2009 Symposium on Computational Geometry http://doi.acm.org/10.1145/1542362.1542382 conf/compgeom/2009 db/conf/compgeom/compgeom2009.html#BergNSV09