@article{1077473739, author = {Zimmerberg, Hyman J.}, title = {A self-adjoint differential system of even order}, journal = {Duke Math. J.}, volume = {13}, number = {1}, year = {1946}, pages = { 411-417}, language = {en}, url = {http://dml.mathdoc.fr/item/1077473739} }
Zimmerberg, Hyman J. A self-adjoint differential system of even order. Duke Math. J., Tome 13 (1946) no. 1, pp. 411-417. http://gdmltest.u-ga.fr/item/1077473739/