@article{DAN_1972_205_3_a4,
     author = {N. K. Nikol'skii},
     title = {Unilateral estimates of the modulus of harmonic functions in a disk and in a strip},
     journal = {Doklady Akademii Nauk},
     pages = {522--525},
     publisher = {mathdoc},
     volume = {205},
     number = {3},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_205_3_a4/}
}