@article{1077473740,
author = {Bergman, Stefan},
title = {Classes of solutions of linear partial differential equations
in three variables},
journal = {Duke Math. J.},
volume = {13},
number = {1},
year = {1946},
pages = { 419-458},
language = {en},
url = {http://dml.mathdoc.fr/item/1077473740}
}
Bergman, Stefan. Classes of solutions of linear partial differential equations
in three variables. Duke Math. J., Tome 13 (1946) no. 1, pp. 419-458. http://gdmltest.u-ga.fr/item/1077473740/