%0 Journal Article %A G. L. Shpilker %T Some differential properties of a commutative hypercomplex %J Doklady Akademii Nauk %D 1987 %P 578-583 %V 293 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1987_293_3_a15/ %G ru %F DAN_1987_293_3_a15