%0 Journal Article %A V. P. Gerdt %T Algebraically simple involutive differential systems and Cauchy problem %J Zapiski Nauchnykh Seminarov POMI %D 2009 %P 94-103 %V 373 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2009_373_a5/ %G en %F ZNSL_2009_373_a5