1. Geometric Algebra,;E. Artin;Interscience Tracts in Pure and Applied Mathematics,1957
2. Arithmetic subgroups of algebraic groups,;A. Borel;Ann. Math.,1962
3. Values of isotropic quadratic forms at $S$-integral points,;A. Borel;Compositio Math.,1992
4. Arithmetic subgroups of algebraic groups,;A. Borel;Ann. Math.,1962
5. Integrability Estimates on the Space of $S$-Arithmetic Lattices with Applications to Quadratic Forms,;R. Cheung;Ph.D. Thesis,2016