@article{DAN_1964_157_2_a6,
     author = {I. P. Mityuk},
     title = {The symmetrization principle for multiply connected domains},
     journal = {Doklady Akademii Nauk},
     pages = {268--270},
     publisher = {mathdoc},
     volume = {157},
     number = {2},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_157_2_a6/}
}