1. Dickson, L.E.: On Quaternions and Their Generalization and the History of the Eight Square Theorem. Ann. Math. 20, 155 (1919)
2. Hamilton, W.R.: Elements of Quaternions. Chelsea Publications Co., New York (1969)
3. Tait, P.G.: An elementary Treatise on Quaternions. Oxford Univ. Press (1875)
4. Cayley, A., An Jacobi’s elliptic functions, Cayley, A., An Jacobi’s elliptic functions, i.n.r.eply.t.o.t.he.Rev.B.B.ornwin;.a.nd.o.n.q.uaternion. Phil. Mag. 26, 208 (1845) Phil. Mag. 26, 208 (1845)
5. Graves, R.P.: Life of Sir William Rowan Hamilton, vol. 3. Arno Press, New York (1975)