1. Bilgici, G., Tokeşer, Ü., Ünal, Z.: $$k$$-Fibonacci and $$k$$-Lucas generalized quaternions. Konuralp J. Math. 5(2), 102–113 (2017)
2. Cho, E.: De Moivre’s formula for quaternions. Appl. Math. Lett. 11(6), 33–35 (1998)
3. Clifford, W.: Preliminary sketch of biquaternions. Proc. Lond. Math. Soc. 10, 381–395 (1873)
4. Cockle, J.: On Systems of algebra involving more than one imaginary; and on equations of the fifth degree. Philos. Mag. 35(238), 434–437 (1849)
5. Daşdemir, A., Bilgici, G.: Gaussian Mersenne numbers and generalized Mersenne quaternions. Notes Number Theory Discrete Math. 25(3), 87–96 (2019). https://doi.org/10.7546/nntdm.2019.25.3.87-96