@article{ZVMMF_1976_16_6_a16,
     author = {R. P. Tarasov},
     title = {Ray equations for arbitrarily curved cylinders with refractive index varying according to the cross-section, and some cases of their integration},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1539--1550},
     publisher = {mathdoc},
     volume = {16},
     number = {6},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1976_16_6_a16/}
}