@article{1103038898, author = {Shapiro, Victor L.}, title = {Intrinsic operators in three-space.}, journal = {Pacific J. Math.}, volume = {9}, number = {4}, year = {1959}, pages = { 1257-1267}, language = {en}, url = {http://dml.mathdoc.fr/item/1103038898} }
Shapiro, Victor L. Intrinsic operators in three-space.. Pacific J. Math., Tome 9 (1959) no. 4, pp. 1257-1267. http://gdmltest.u-ga.fr/item/1103038898/