@article{DAN_1991_318_2_a19,
     author = {V. K. Ignatovich},
     title = {On linear transport problems},
     journal = {Doklady Akademii Nauk},
     pages = {332--336},
     year = {1991},
     volume = {318},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_318_2_a19/}
}