Do Quasars Cluster on Small Scales ( $\lesssim 15h^{-1}$ Mpc)?

Infante, L., Moles, M., & Varela, J. (2006). Do Quasars Cluster on Small Scales ( $\lesssim 15h^{-1}$ Mpc)? In Lighthouses of the Universe: The Most Luminous Celestial Objects and Their Use for Cosmology (pp. 295–297). Springer-Verlag. https://doi.org/10.1007/10856495_44