Wenlin Qiu Da Xu Haifan Chen Jing Guo An alternating direction implicit Galerkin finite element method for the distributed-order time-fractional mobile-immobile equation in two dimensions. 3156-3172 2020 80 Comput. Math. Appl. 12 https://doi.org/10.1016/j.camwa.2020.11.003 db/journals/cma/cma80.html#QiuXCG20