@article{DE_1970_6_1_a5,
     author = {D. K. Gvazava},
     title = {Certain estimates of the solutions of nonlinear equations of mixed type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {50--55},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1970_6_1_a5/}
}