@article{DE_1985_21_1_a1,
     author = {I. I. Bavrin},
     title = {Operators for harmonic functions and their applications},
     journal = {Differencialʹnye uravneni\^a},
     pages = {9--15},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_1_a1/}
}