Jan Terje Bjørke John K. Grytten Morten Hæger Stein Nilsen A Global Grid Model Based on "Constant Area" Quadrilaterals. 239-250 2003 conf/scangis/2003 ScanGIS http://www.scangis.org/scangis2003/papers/3.pdf db/conf/scangis/scangis2003.html#BjorkeGHN03