Weiping Bu Yifa Tang Yingchuan Wu Jiye Yang Crank-Nicolson ADI Galerkin finite element method for two-dimensional fractional FitzHugh-Nagumo monodomain model. 355-364 2015 257 Appl. Math. Comput. https://doi.org/10.1016/j.amc.2014.09.034 db/journals/amc/amc257.html#BuTWY15