@article{1250128119, author = {Howes, F.A.}, title = {Differential inequality techniques and singular perturbations}, journal = {Rocky Mountain J. Math.}, volume = {12}, number = {4}, year = {1982}, pages = { 767-778}, language = {en}, url = {http://dml.mathdoc.fr/item/1250128119} }
Howes, F.A. Differential inequality techniques and singular perturbations. Rocky Mountain J. Math., Tome 12 (1982) no. 4, pp. 767-778. http://gdmltest.u-ga.fr/item/1250128119/