@article{DAN_1966_166_4_a2,
     author = {M. Ya. Zinger},
     title = {Functionals of derivatives in the complex plane},
     journal = {Doklady Akademii Nauk},
     pages = {775--778},
     publisher = {mathdoc},
     volume = {166},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_166_4_a2/}
}