%0 Journal Article %A D. V. Solomatin %T Direct products of cyclic semigroups admitting a~planar Caley graph %J Sibirskie èlektronnye matematičeskie izvestiâ %D 2006 %P 238-252 %V 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SEMR_2006_3_a15/ %G ru %F SEMR_2006_3_a15