@article{1183530831,
author = {Kreith, Kurt},
title = {A Sturm theorem for strongly elliptic systems and applications},
journal = {Bull. Amer. Math. Soc.},
volume = {75},
number = {5},
year = {1969},
pages = { 1025-1027},
language = {en},
url = {http://dml.mathdoc.fr/item/1183530831}
}
Kreith, Kurt. A Sturm theorem for strongly elliptic systems and applications. Bull. Amer. Math. Soc., Tome 75 (1969) no. 5, pp. 1025-1027. http://gdmltest.u-ga.fr/item/1183530831/