1. Rosenfeld, B.: Geometry of Lie Groups. Kluwer Academic, Dordrect (1997)
2. Ebbinghaus, H.-D., Hermes, H., Hirzebruch, F., Koecher, M., Mainzer, K., Neukirch, J., Prestel, A., Remmert, R.: Numbers. With an introduction by Klaus Lamotke. Translated by H. L. S. Orde. Edited by John H. Ewing. Paperback ed. Graduate Texts in Mathematics. Springer, New York (1991)
3. Zhang, F.: Quaternions and matrices of quaternions. Linear Algebra Appl. 251, 21–57 (1997)
4. Yaglom, I.M.: Complex Numbers in Geometry. Academic, New York (1968)
5. Özyurt, G., Alagöz, Y.: On hyperbolic split quaternions and hyperbolic split quaternion matrices. Adv. Appl. Cliff. Algebras 28(88), 1–11 (2018)