@article{M2AN_2019__53_4_1223_0,
     author = {Wei, Ting and Xian, Jun},
     title = {Variational method for a backward problem for a time-fractional diffusion equation},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {1223--1244},
     publisher = {EDP-Sciences},
     volume = {53},
     number = {4},
     year = {2019},
     doi = {10.1051/m2an/2019019},
     mrnumber = {3978472},
     zbl = {1471.65128},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/m2an/2019019/}
}