@article{1183528176,
author = {Beals, Richard},
title = {On eigenvalue distributions for elliptic operators without smooth coefficients},
journal = {Bull. Amer. Math. Soc.},
volume = {72},
number = {4},
year = {1966},
pages = { 701-705},
language = {en},
url = {http://dml.mathdoc.fr/item/1183528176}
}
Beals, Richard. On eigenvalue distributions for elliptic operators without smooth coefficients. Bull. Amer. Math. Soc., Tome 72 (1966) no. 4, pp. 701-705. http://gdmltest.u-ga.fr/item/1183528176/