Gravitational lensing and shadow of charged black holes in the low-energy limit of string theory Younes Younesizadeh, Feyzollah Younesizadeh and Mohammad M. Qaemmaqami Eur. Phys. J. Plus, 137 1 (2022) 76 Published online: 03 January 2022 DOI: 10.1140/epjp/s13360-021-02290-2