%0 Journal Article %A V. N. Sorokin %T Cyclic graphs and Apéry's theorem %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2002 %P 535-571 %V 57 %N 3 %U http://geodesic.mathdoc.fr/item/RM_2002_57_3_a2/ %G en %F RM_2002_57_3_a2