@article{DAN_1987_292_2_a14,
     author = {N. B. Engibaryan and \`E. A. Melkonyan},
     title = {On the method of discrete ordinates},
     journal = {Doklady Akademii Nauk},
     pages = {322--326},
     publisher = {mathdoc},
     volume = {292},
     number = {2},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_292_2_a14/}
}