%0 Journal Article %A V. V. Isaev-Ivanov %A V. A. Ryzhov %A V. N. Fomichev %T Nonlinear relaxation effects in paramagnetic substances %J Doklady Akademii Nauk %D 1975 %P 794-797 %V 225 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1975_225_4_a13/ %G ru %F DAN_1975_225_4_a13