Fujio Yamaguchi Masatoshi Niizeki Some basic geometric test conditions in terms of Plücker coordinates and Plücker coefficients. 29-41 1997 13 The Visual Computer 1 http://link.springer.de/link/service/journals/00371/bibs/7013001/70130029.htm db/journals/vc/vc13.html#YamaguchiN97