%0 Journal Article %A Zhonglong Zhao %A Lingchao He %T Lie symmetry, nonlocal symmetry analysis, and interaction of solutions of a $(2+1)$-dimensional KdV–mKdV equation %J Teoretičeskaâ i matematičeskaâ fizika %D 2021 %P 164-185 %V 206 %N 2 %U http://geodesic.mathdoc.fr/item/TMF_2021_206_2_a2/ %G ru %F TMF_2021_206_2_a2