%0 Journal Article %A Bárány, Imre %A Füredi, Zoltán %A Pach, János %T Discrete Convex Functions and Proof of the Six Circle Conjecture of Fejes Tóth %J Canadian journal of mathematics %D 1984 %P 569-576 %V 36 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1984-035-1/ %R 10.4153/CJM-1984-035-1 %F 10_4153_CJM_1984_035_1