Focus Point on Fractional Differential Equations in Physics: Recent Advantages and Future DirectionD. Baleanu, C. Cattani, M. V. Shitikova, H. G. Sun and Y. ZhangEur. Phys. J. Plus, 134 11 (2019) 554DOI: https://doi.org/10.1140/epjp/i2019-13078-0