Therese C. Biedl Lesvia Elena Ruiz Velázquez Orthogonal Cartograms with Few Corners Per Face. 98-109 2011 WADS http://dx.doi.org/10.1007/978-3-642-22300-6_9 conf/wads/2011 db/conf/wads/wads2011.html#BiedlV11