@article{1250523559, author = {Watanabe, Mineko}, title = {Generalized normal derivatives of principal functions}, journal = {J. Math. Kyoto Univ.}, volume = {12}, number = {2}, year = {1972}, pages = { 33-54}, language = {en}, url = {http://dml.mathdoc.fr/item/1250523559} }
Watanabe, Mineko. Generalized normal derivatives of principal functions. J. Math. Kyoto Univ., Tome 12 (1972) no. 2, pp. 33-54. http://gdmltest.u-ga.fr/item/1250523559/