@article{MZM_1969_5_6_a7,
     author = {A. A. Sedaev},
     title = {A~problem in plane topology},
     journal = {Matemati\v{c}eskie zametki},
     pages = {709--718},
     publisher = {mathdoc},
     volume = {5},
     number = {6},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1969_5_6_a7/}
}