@article{DAN_1967_177_4_a16,
     author = {V. V. Sobolev},
     title = {Diffusion of radiation when the scattering indicatrix is greatly drawn out in length},
     journal = {Doklady Akademii Nauk},
     pages = {812--815},
     year = {1967},
     volume = {177},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_177_4_a16/}
}