@article{1183505726,
author = {Nielsen, Kaj L.},
title = {On the Bergman operators for linear partial differential equations},
journal = {Bull. Amer. Math. Soc.},
volume = {50},
number = {12},
year = {1944},
pages = { 195-201},
language = {en},
url = {http://dml.mathdoc.fr/item/1183505726}
}
Nielsen, Kaj L. On the Bergman operators for linear partial differential equations. Bull. Amer. Math. Soc., Tome 50 (1944) no. 12, pp. 195-201. http://gdmltest.u-ga.fr/item/1183505726/