%0 Journal Article %A O. R. Musin %A A. S. Tarasov %T Extremal problems of circle packings on a~sphere and irreducible contact graphs %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2015 %P 133-148 %V 288 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2015_288_a8/ %G ru %F TM_2015_288_a8