@article{01929991,
title = {Birkhoff-Kellogg theorems on invariant directions for multimaps.},
journal = {Abstract and Applied Analysis},
volume = {2003},
year = {2003},
pages = {435-448},
doi = {10.1155/S1085337503205030},
zbl = {1045.47040},
language = {en},
url = {http://dml.mathdoc.fr/item/01929991}
}
Agarwal, Ravi P.; O'Regan, Donal. Birkhoff-Kellogg theorems on invariant directions for multimaps.. Abstract and Applied Analysis, Tome 2003 (2003) pp. 435-448. doi : 10.1155/S1085337503205030. http://gdmltest.u-ga.fr/item/01929991/