%0 Journal Article
%A A. P. Norden
%A N. M. Ostianu
%A V. V. Ryzhkov
%T German Fedorovich Laptev (on his sixtieth birthday)
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1970
%P 239-244
%V 25
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1970_25_5_a10/
%G en
%F RM_1970_25_5_a10