@article{MZM_1995_58_4_a2,
     author = {V. G. Boltyanskii},
     title = {Solution to the lighting problem for zone bodies},
     journal = {Matemati\v{c}eskie zametki},
     pages = {505--511},
     publisher = {mathdoc},
     volume = {58},
     number = {4},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1995_58_4_a2/}
}