%0 Journal Article
%A M. V. Girshovich
%T On conditions for effecting second-degree constructions in the Lobatchevsky plane using only a ruler
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1963
%P 30-38
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1963_5_a4/
%G ru
%F IVM_1963_5_a4