@article{MZM_1970_7_2_a0,
     author = {N. N. Beloozerov},
     title = {Note on the addition theorem for {Legendre} functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {137--145},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1970_7_2_a0/}
}