%0 Journal Article %A N. A. Izobov %A A. S. Platonov %T Construction of a linear Pfaff equation with arbitrarily given characteristics and lower characteristic sets %J Differencialʹnye uravneniâ %D 1998 %P 1596-1603 %V 34 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1998_34_12_a1/ %G ru %F DE_1998_34_12_a1