@article{DE_1983_19_1_a17,
     author = {R. I. Sokhadze},
     title = {The first boundary value problem for an equation of mixed type in a rectangle},
     journal = {Differencialʹnye uravneni\^a},
     pages = {127--134},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_1_a17/}
}