@article{01883728,
title = {Sign-changing and multiple solutions for the },
journal = {Abstract and Applied Analysis},
volume = {7},
year = {2002},
pages = {613-625},
doi = {10.1155/S1085337502207010},
zbl = {1106.35308},
language = {en},
url = {http://dml.mathdoc.fr/item/01883728}
}
Carl, Siegfried; Perera, Kanishka. Sign-changing and multiple solutions for the . Abstract and Applied Analysis, Tome 7 (2002) pp. 613-625. doi : 10.1155/S1085337502207010. http://gdmltest.u-ga.fr/item/01883728/