@article{IZKAB_2015_6-2_a40, author = {N. V. Reutova and F. R. Dreyeva and T. V. Reutova}, title = {Comparative investigation of natural }, journal = {News of the Kabardin-Balkar scientific center of RAS}, pages = {270--275}, publisher = {mathdoc}, number = {6-2}, year = {2015}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IZKAB_2015_6-2_a40/} }