%0 Journal Article %A S. A. Semenkovich %T The thermodynamic potential and the width of the forbidden zone in semiconducting compounds %J Doklady Akademii Nauk %D 1964 %P 442-445 %V 158 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_158_2_a41/ %G ru %F DAN_1964_158_2_a41