@article{DAN_1970_191_3_a5,
     author = {V. Ya. Gutlyanskii},
     title = {Variational theorems for certain classes of analytic functions in doubly connected domains},
     journal = {Doklady Akademii Nauk},
     pages = {522--525},
     publisher = {mathdoc},
     volume = {191},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_191_3_a5/}
}