I. Beloto, E. Cypriano, and M. Makler, “Spectroscopic determination of velocity dispersion lens galaxies and their impact on the measurement of the post-Newtonian parameter”, Cad. Astro., vol. 5, no. Especial, pp. 60–66, Jul. 2024, doi: 10.47456/Cad.Astro.v5nEspecial.44957.