@article{05036722,
title = {Sufficient conditions for },
journal = {General Mathematics},
volume = {12},
year = {2004},
pages = {61-66},
zbl = {1092.30023},
language = {en},
url = {http://dml.mathdoc.fr/item/05036722}
}
Holhoş, Viorel Cosmin. Sufficient conditions for . General Mathematics, Tome 12 (2004) pp. 61-66. http://gdmltest.u-ga.fr/item/05036722/