%0 Journal Article
%A Zelinka, Bohdan
%T Centers of directed cacti
%J Časopis pro pěstování matematiky
%D 1989
%P 225-229
%V 114
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CPM.1989.118370/
%R 10.21136/CPM.1989.118370
%G en
%F 10_21136_CPM_1989_118370