Gravitational lensing by transparent Janis–Newman–Winicour naked singularities Deyou Chen, Yiqian Chen, Peng Wang, Tianshu Wu and Houwen Wu Eur. Phys. J. C, 84 6 (2024) 584 Published online: 07 June 2024 DOI: 10.1140/epjc/s10052-024-12950-z