%0 Journal Article %A N. K. Bel'skii %A D. A. Muhamedova %T Determination of the ruby $R_1$-line oscillator at $78^\circ$~K by means of Rozhdestvenskii's hooks %J Doklady Akademii Nauk %D 1965 %P 527-529 %V 162 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1965_162_3_a11/ %G ru %F DAN_1965_162_3_a11