@article{FAA_1979_13_3_a6,
     author = {P. A. Frolov},
     title = {Topological structure of normally solvable first boundary-value problems in the plane},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {60--70},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1979_13_3_a6/}
}