@article{00733118,
title = {Applications of the method of barriers. I: Some boundary-value problems.},
journal = {Georgian Mathematical Journal},
volume = {2},
year = {1995},
pages = {99-110},
doi = {10.1007/BF02257737},
zbl = {0833.34016},
language = {en},
url = {http://dml.mathdoc.fr/item/00733118}
}
Rozov, N.Kh.; Sushko, V.G. Applications of the method of barriers. I: Some boundary-value problems.. Georgian Mathematical Journal, Tome 2 (1995) pp. 99-110. doi : 10.1007/BF02257737. http://gdmltest.u-ga.fr/item/00733118/