%0 Journal Article %A G. N. Mil'shtein %T On the problem of analytic construction of regulators for equations of parabolic and hyperbolic type %J Differencialʹnye uravneniâ %D 1972 %P 678-695 %V 8 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1972_8_4_a12/ %G ru %F DE_1972_8_4_a12