Low momentum scattering of the Dirac particlewith an asymmetric cusp potentialYu Jiang, Shi-Hai Dong, A. Antillón and M. Lozada-CassouEur. Phys. J. C, 45 2 (2006) 525-528DOI: https://doi.org/10.1140/epjc/s2005-02430-7