%0 Journal Article
%T Announcement. Mathematica Bohemica
%J Mathematica Bohemica
%D 1991
%V 116
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/MB.1991.116993/
%R 10.21136/MB.1991.116993
%G cz
%F 10_21136_MB_1991_116993