%0 Journal Article
%A B. N. Ivanov
%T A direct method for calculating cell cycles of~a~block~map of a simple planar graph
%J Prikladnaâ diskretnaâ matematika
%D 2022
%P 69-83
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PDM_2022_4_a6/
%G ru
%F PDM_2022_4_a6