@article{SJIM_2005_8_1_a7,
     author = {D. S. Konovalova},
     title = {A method for approximating the visibility measure in {X-ray} tomography},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {64--69},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2005_8_1_a7/}
}