@article{MZM_1976_20_3_a2,
     author = {N. N. Beloozerov},
     title = {Addition theorems for {Legendre} functions as corollaries of an addition theorem for {Gegenbauer} polynomials},
     journal = {Matemati\v{c}eskie zametki},
     pages = {321--330},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1976_20_3_a2/}
}