@article{1250131814,
author = {Kreith, Kurt},
title = {Nodal domain theorems for general elliptic equations},
journal = {Rocky Mountain J. Math.},
volume = {1},
number = {4},
year = {1971},
pages = { 419-426},
language = {en},
url = {http://dml.mathdoc.fr/item/1250131814}
}
Kreith, Kurt. Nodal domain theorems for general elliptic equations. Rocky Mountain J. Math., Tome 1 (1971) no. 4, pp. 419-426. http://gdmltest.u-ga.fr/item/1250131814/