Beissen, N., Utepova, D., Muratkhan, A., Orazymbet, A., Khassanov, M. and Toktarbay, S. (2023) “Application of GBT theorem for Gravitational deflection of light by Compact Objects”, Recent Contributions to Physics, 2023(1), pp. 15–21. doi: 10.26577/RCPh.2023.v84.i1.02.