%0 Journal Article %A N. V. Kravtsov %T The possibility of recording high-frequency radiations at lower frequencies %J Doklady Akademii Nauk %D 1963 %P 314 %V 151 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1963_151_2_a19/ %G ru %F DAN_1963_151_2_a19