@article{01779100, title = {Monotone-iterative technique of Lakshmikantham for the initial value problem for a differential equation with a step function.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {30}, year = {2002}, pages = {57-64}, doi = {10.1155/S0161171202011699}, zbl = {1012.34061}, language = {en}, url = {http://dml.mathdoc.fr/item/01779100} }
Hristova, S.G.; Rangelova, M.A. Monotone-iterative technique of Lakshmikantham for the initial value problem for a differential equation with a step function.. International Journal of Mathematics and Mathematical Sciences, Tome 30 (2002) pp. 57-64. doi : 10.1155/S0161171202011699. http://gdmltest.u-ga.fr/item/01779100/