%0 Journal Article %A P. V. Schastnev %A G. M. Zhidomirov %T On the semiempirical theory of isotropic superfine splitting in the electron spin resonance spectra of free radicals %J Doklady Akademii Nauk %D 1963 %P 151-153 %V 153 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1963_153_1_a37/ %G ru %F DAN_1963_153_1_a37