%0 Journal Article %A G. D. Kordyumov %T Derivatives in the mean of random processes and diffusion models in economics %J Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematika, mehanika, fizika %D 2021 %P 26-30 %V 13 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/VYURM_2021_13_3_a2/ %G ru %F VYURM_2021_13_3_a2