%0 Journal Article %A L. A. Shuvalov %A A. M. Shirokov %T Features characteristic of the dependence of internal friction upon deformation amplitude in single-crystal ferroelectrics %J Doklady Akademii Nauk %D 1964 %P 1075-1077 %V 154 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_154_5_a20/ %G ru %F DAN_1964_154_5_a20