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References to 'Beltrami-Klein model'
1. comparison of common geometries by Wkbj79
2. converting between the Beltrami-Klein model and the Poincar\'{e} disc model by Wkbj79
3. example of quasi-affine variety that is not affine by Mathprof
4. Hurwitz matrix by lha
5. ideal triangle by Wkbj79
6. Lambert quadrilateral by Wkbj79
7. meromorphic function on projective space must be rational by jirka
8. non-Euclidean geometry by Wkbj79
9. parallel lines in hyperbolic geometry by Wkbj79
10. Poincar\'e disc model by Wkbj79
11. projective plane by yark
12. Saccheri quadrilateral by Wkbj79