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@article{DAN_1991_317_2_a18, author = {S. M. Zerkal'}, title = {Determination of non-transparent regions in the {Earth} by method of computer}, journal = {Doklady Akademii Nauk}, pages = {330--333}, publisher = {mathdoc}, volume = {317}, number = {2}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1991_317_2_a18/} }
S. M. Zerkal'. Determination of non-transparent regions in the Earth by method of computer. Doklady Akademii Nauk, Tome 317 (1991) no. 2, pp. 330-333. http://geodesic.mathdoc.fr/item/DAN_1991_317_2_a18/