%0 Journal Article %A V. E. Balabaev %T A quaternion analog of the Cauchy--Riemann system in four-dimensional complex space and some of its applications %J Doklady Akademii Nauk %D 1974 %P 489-491 %V 214 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1974_214_3_a0/ %G ru %F DAN_1974_214_3_a0