%0 Journal Article %A M. I. Klyuchantsev %T Introduction to the theory of $(\nu_1,\dots,\nu_{r-1})$-transforms %J Sbornik. Mathematics %D 1988 %P 163-176 %V 60 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1988_60_1_a9/ %G en %F SM_1988_60_1_a9