@article{1255455120,
author = {Feller, William},
title = {Differential operators with the positive maximum property},
journal = {Illinois J. Math.},
volume = {3},
number = {1},
year = {1959},
pages = { 182-186},
language = {en},
url = {http://dml.mathdoc.fr/item/1255455120}
}
Feller, William. Differential operators with the positive maximum property. Illinois J. Math., Tome 3 (1959) no. 1, pp. 182-186. http://gdmltest.u-ga.fr/item/1255455120/