@article{1183500409, author = {Williams, A. R.}, title = {Birational transformations in 4-space and 5-space}, journal = {Bull. Amer. Math. Soc.}, volume = {44}, number = {11}, year = {1938}, pages = { 272-278}, language = {en}, url = {http://dml.mathdoc.fr/item/1183500409} }
Williams, A. R. Birational transformations in 4-space and 5-space. Bull. Amer. Math. Soc., Tome 44 (1938) no. 11, pp. 272-278. http://gdmltest.u-ga.fr/item/1183500409/