%0 Journal Article %A B. A. Volkov %A O. A. Pankratov %T Jahn--Teller instability of the crystalline surrounding of point defects in semiconducting $\mathrm{A}^4\mathrm{B}^6$ compounds %J Doklady Akademii Nauk %D 1980 %P 93-97 %V 255 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1980_255_1_a23/ %G ru %F DAN_1980_255_1_a23