Fractional order of rational Jacobi functions for solving the non-linear singular Thomas-Fermi equationKourosh Parand, Pooria Mazaheri, Hossein Yousefi and Mehdi DelkhoshEur. Phys. J. Plus, 132 2 (2017) 77DOI: https://doi.org/10.1140/epjp/i2017-11351-x