%0 Journal Article %A R. K. Gupta %A K. Singla %T Symmetry analysis of variable-coefficient time-fractional nonlinear systems of partial differential equations %J Teoretičeskaâ i matematičeskaâ fizika %D 2018 %P 397-416 %V 197 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_2018_197_3_a4/ %G ru %F TMF_2018_197_3_a4