%0 Journal Article %A A. N. Varchenko %T Critical values and the determinant of the periods %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1989 %P 209-210 %V 44 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1989_44_4_a9/ %G en %F RM_1989_44_4_a9