%0 Journal Article
%A A. A. Dobrynin
%A L. S. Mel'nikov
%T Two series of edge-$4$-critical Gr\"otzsch--Sachs graphs generated by four curves in the plane
%J Sibirskie èlektronnye matematičeskie izvestiâ
%D 2008
%P 255-278
%V 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SEMR_2008_5_a19/
%G en
%F SEMR_2008_5_a19