@article{DE_1974_10_1_a0,
     author = {M. H. Abregov},
     title = {Some problems of the type of the {Bicadze--Samarski{\v\i}} problem for a certain equation of mixed type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {3--6},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_1_a0/}
}