@article{DE_1970_6_11_a10,
     author = {N. I. Brisch and I. N. Yashkina},
     title = {The {Dirichlet} problem for elliptic equations with unbounded lowest coefficients. {I,} {II}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2021--2029},
     publisher = {mathdoc},
     volume = {6},
     number = {11},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1970_6_11_a10/}
}