@article{KJM_2014_38_1_a3,
     author = {C. G. Li and M. Kosti\'c and M. Li},
     title = {Abstract {Multi-term} {Fractional} {Differential} {Equations}},
     journal = {Kragujevac Journal of Mathematics},
     pages = {51 },
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KJM_2014_38_1_a3/}
}