@article{1250126194,
author = {Cantrell, Robert Steven},
title = {On the simplicity and uniqueness of positive eigenvalues admitting positive eigenfunctions for weakly coupled elliptic systems},
journal = {Rocky Mountain J. Math.},
volume = {18},
number = {4},
year = {1988},
pages = { 269-276},
language = {en},
url = {http://dml.mathdoc.fr/item/1250126194}
}
Cantrell, Robert Steven. On the simplicity and uniqueness of positive eigenvalues admitting positive eigenfunctions for weakly coupled elliptic systems. Rocky Mountain J. Math., Tome 18 (1988) no. 4, pp. 269-276. http://gdmltest.u-ga.fr/item/1250126194/