@article{DE_1987_23_1_a19,
     author = {K. Yu. Kishkis},
     title = {On a nonlocal problem for functions harmonic in a multiply connected domain},
     journal = {Differencialʹnye uravneni\^a},
     pages = {174--177},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_1_a19/}
}