Gravitational lensing and shadow of charged black holes in the low-energy limit of string theoryYounes Younesizadeh, Feyzollah Younesizadeh and Mohammad M. QaemmaqamiEur. Phys. J. Plus, 137 1 (2022) 76DOI: https://doi.org/10.1140/epjp/s13360-021-02290-2