@article{DAN_1978_239_3_a8, author = {V. P. Polityukov}, title = {On the theory of upper and lower solutions for the nonlinear transport equation}, journal = {Doklady Akademii Nauk}, pages = {534--537}, publisher = {mathdoc}, volume = {239}, number = {3}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1978_239_3_a8/} }