The real orthogonal group and Vahlen matrices by Kunwor, Bimal

Geogebra as a strategy in teaching geometry among grade 7 students by Pancubella, Ma. Concepcion G.

Encyclopedia of analytical surfaces by Krivoshapko, S. N. (Sergei Nikolaevich), Ivanov, V. N.

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Advanced modern algebra by Rotman, Joseph J.

Elementary algebraic geometry by Kendig, Keith

Understanding geometric algebra Hamilton, Grassmann, and Clifford for computer vision and graphics by Kanatani, Kenichi

Noncommutative geometry and particle physics by Suijlekom, Walter D., van

A participatory approach to modern geometry by Kappraff, Jay

Analytic hyperbolic geometry in N dimensions an introduction by Ungar, Abraham A.

Rational points on elliptic curves by Silverman, Joseph H., Tate, John T.