%0 Journal Article
%A A. P. Yushkevich
%T N.\,I.~Lobachevskii. Scientific and pedagogic legacy. Guidance of the Kazan' University. Fragments. Letters (a~review)
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1978
%V 33
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1978_33_3_a33/
%G ru
%F RM_1978_33_3_a33