Probing the parameters of a Schwarzschild black hole surrounded by quintessence and cloud of strings through four standard astrophysical testsVíctor H. Cárdenas, Mohsen Fathi, Marco Olivares and J. R. VillanuevaEur. Phys. J. C, 81 10 (2021) 866DOI: https://doi.org/10.1140/epjc/s10052-021-09654-z