%0 Journal Article %A V. V. Kapustin %T Characteristic functions and their factorizations %J Zapiski Nauchnykh Seminarov POMI %D 1997 %P 71-78 %V 247 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1997_247_a4/ %G ru %F ZNSL_1997_247_a4