Scott Hine F. Betul Atalay Dianna Xu Suneeta Ramaswami Quadrilateral meshes with bounded minimum angle. 90-91 2009 Symposium on Computational Geometry http://doi.acm.org/10.1145/1542362.1542379 conf/compgeom/2009 db/conf/compgeom/compgeom2009.html#HineAXR09