%0 Journal Article %A N. I. Akhiezer %A I. I. Vorovich %A N. V. Efimov %A V. P. Zaharyuta %A B. Ya. Levin %T Mikhail Grigor'evich Khaplanov (on his seventieth birthday) %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1973 %P 141-146 %V 28 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1973_28_3_a5/ %G en %F RM_1973_28_3_a5