@article{1102959508, author = {Johnson, N. L.}, title = {Derivation in infinite planes.}, journal = {Pacific J. Math.}, volume = {43}, number = {3}, year = {1972}, pages = { 387-402}, language = {en}, url = {http://dml.mathdoc.fr/item/1102959508} }
Johnson, N. L. Derivation in infinite planes.. Pacific J. Math., Tome 43 (1972) no. 3, pp. 387-402. http://gdmltest.u-ga.fr/item/1102959508/