Dorit Merhof Roberto Grosso Udo Tremel Günther Greiner Anisotropic quadrilateral mesh generation: An indirect approach. 860-867 2007 38 Advances in Engineering Software 11-12 http://dx.doi.org/10.1016/j.advengsoft.2006.08.036 db/journals/aes/aes38.html#MerhofGTG07