@article{DE_1991_27_6_a11,
     author = {V. I. Agoshkov},
     title = {An inverse problem in transport theory and properties of a reflection operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1002--1006},
     publisher = {mathdoc},
     volume = {27},
     number = {6},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_6_a11/}
}