%0 Journal Article %A Abul Maksud Sayied %T Galois Theory for the Family of Partial Differential Equations ...... = 0. %J Mathematische Zeitschrift %D 1970 %P 22-32 %V 114 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1970__114_171293/ %F MZ_1970__114_171293