%0 Journal Article %A A. D. Mednykh %T Determination of the number of nonequivalent coverings over a compact Riemann surface %J Doklady Akademii Nauk %D 1978 %P 269-271 %V 239 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1978_239_2_a3/ %G ru %F DAN_1978_239_2_a3