Modified theory of gravity and clustering of multi-component system of galaxies Mir Hameeda, Behnam Pourhassan, Mir Faizal, C. P. Masroor, Rizwan Ul Haq Ansari and P. K. Suresh Eur. Phys. J. C, 79 9 (2019) 769 Published online: 17 September 2019 DOI: 10.1140/epjc/s10052-019-7281-7