A. R. Adem, C. M. Khalique, “Symbolic computation of conservation laws and exact solutions of a coupled variable-coefficient modified Korteweg–de Vries system”, Ж. вычисл. матем. и матем. физ., 56:4 (2016), 664; Comput. Math. Math. Phys., 56:4 (2016), 650–660