@article{DAN_1976_231_4_a17,
     author = {T. A. Germogenova and D. A. Shulaya},
     title = {The characteristic equation of radiation transfer theory},
     journal = {Doklady Akademii Nauk},
     pages = {841--844},
     publisher = {mathdoc},
     volume = {231},
     number = {4},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_231_4_a17/}
}