@article{DAN_1968_182_2_a26, author = {R. M. Galperina}, title = {On the physical foundations and reconnaissance potentialities of }, journal = {Doklady Akademii Nauk}, pages = {334--336}, publisher = {mathdoc}, volume = {182}, number = {2}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_182_2_a26/} }