@article{DAN_1991_316_4_a9,
     author = {B. E. Levitsii},
     title = {Reduced $p$-modulus and the interior $p$-harmonic radius},
     journal = {Doklady Akademii Nauk},
     pages = {812--815},
     publisher = {mathdoc},
     volume = {316},
     number = {4},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_316_4_a9/}
}