@article{1183503786, author = {Purcell, Edwin J.}, title = {Cremona involutions determined by two line congruences}, journal = {Bull. Amer. Math. Soc.}, volume = {47}, number = {11}, year = {1941}, pages = { 596-601}, language = {en}, url = {http://dml.mathdoc.fr/item/1183503786} }
Purcell, Edwin J. Cremona involutions determined by two line congruences. Bull. Amer. Math. Soc., Tome 47 (1941) no. 11, pp. 596-601. http://gdmltest.u-ga.fr/item/1183503786/