@article{ZVMMF_1990_30_9_a5,
     author = {V. I. Gryn'},
     title = {Determination of the absorption coefficient in the spherically symmetric case},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1341--1356},
     year = {1990},
     volume = {30},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1990_30_9_a5/}
}