Study of null and time-like geodesics in the exterior of a Schwarzschild black hole with quintessence and cloud of stringsMohsen Fathi, Marco Olivares and J. R. VillanuevaEur. Phys. J. C, 82 7 (2022) 629DOI: https://doi.org/10.1140/epjc/s10052-022-10600-w