@article{04146426,
title = {A necessary and sufficient condition for uniqueness of solutions of singular differential inequalities.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {13},
year = {1990},
pages = {253-270},
doi = {10.1155/S0161171290000382},
zbl = {0699.34014},
language = {en},
url = {http://dml.mathdoc.fr/item/04146426}
}
Lair, Alan V. A necessary and sufficient condition for uniqueness of solutions of singular differential inequalities.. International Journal of Mathematics and Mathematical Sciences, Tome 13 (1990) pp. 253-270. doi : 10.1155/S0161171290000382. http://gdmltest.u-ga.fr/item/04146426/