%0 Journal Article %A M. V. Kasyan %A V. A. Robsman %A G. N. Nikogosyan %T Changes in emission signal spectra during the development of cracks and distraction of rocks %J Doklady Akademii Nauk %D 1989 %P 826-830 %V 306 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1989_306_4_a13/ %G ru %F DAN_1989_306_4_a13