%0 Journal Article %A V. S. Vladimirov %T Beta functions of local fields of characteristic zero. Applications to string amplitudes %J Izvestiya. Mathematics %D 2002 %P 41-57 %V 66 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2002_66_1_a1/ %G en %F IM2_2002_66_1_a1