@article{MZM_1970_8_3_a7,
     author = {G. Ts. Tumarkin},
     title = {Influence of deformation of the boundary on certain conformal properties or regions (regions in {V.\,I.~Smirnov's} {Class~}$S$)},
     journal = {Matemati\v{c}eskie zametki},
     pages = {351--359},
     publisher = {mathdoc},
     volume = {8},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1970_8_3_a7/}
}