@article{MZM_1968_3_5_a7,
     author = {N. V. Rao},
     title = {Normal families of harmonic functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {547--552},
     publisher = {mathdoc},
     volume = {3},
     number = {5},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1968_3_5_a7/}
}