@article{DAN_1966_168_4_a2,
     author = {A. V. Bitsadze},
     title = {A criterion for convergence of the gradients of a sequence of harmonic functions},
     journal = {Doklady Akademii Nauk},
     pages = {733--734},
     publisher = {mathdoc},
     volume = {168},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_168_4_a2/}
}