@article{05237439, title = {On lower and upper solutions without ordering on time scales.}, journal = {Advances in Difference Equations [electronic only]}, volume = {2006}, year = {2006}, doi = {10.1155/ADE/2006/73860}, zbl = {1139.39035}, language = {en}, url = {http://dml.mathdoc.fr/item/05237439} }
Stehlík, Petr. On lower and upper solutions without ordering on time scales.. Advances in Difference Equations [electronic only], Tome 2006 (2006) . doi : 10.1155/ADE/2006/73860. http://gdmltest.u-ga.fr/item/05237439/