Biswas, Debapriya, and Ipsita Rajwar. “The Geometry of the Projective Action of $\text{SL}(3,\mathbb{R})$ from the Erlangen Perspective”.
Armenian Journal of Mathematics, vol. 16, no. 1, Jan. 2024, pp. 1-28,
https://doi.org/10.52737/18291163-2024.16.1-1-28.