@article{ZNSL_1986_154_a0,
     author = {G. K. Antonyuk and V. V. Kozhevnikov},
     title = {On the {Landau} problem for the class functions regular in an annulus},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--13},
     publisher = {mathdoc},
     volume = {154},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1986_154_a0/}
}