@article{TRSPY_1961_60_a1,
     author = {Yu. E. Alenitsyn},
     title = {An extension of the principle of subordination to multiply connected regions},
     journal = {Informatics and Automation},
     pages = {5--21},
     publisher = {mathdoc},
     volume = {60},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1961_60_a1/}
}