@article{DE_1983_19_8_a15,
     author = {V. T. Erofeenko},
     title = {Addition theorems connected with toroidal, cylindrical and spherical harmonic functions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1416--1427},
     publisher = {mathdoc},
     volume = {19},
     number = {8},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_8_a15/}
}