@article{TMF_2018_197_3_a4,
     author = {R. K. Gupta and K. Singla},
     title = {Symmetry analysis of variable-coefficient time-fractional nonlinear systems of partial differential equations},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {397--416},
     year = {2018},
     volume = {197},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2018_197_3_a4/}
}