Algebraic techniques for Maxwell’s equations in commutative quaternionic electromagnetics Zhenwei Guo, Dong Zhang, Vasily. I. Vasiliev and Tongsong Jiang Eur. Phys. J. Plus, 137 5 (2022) 577 Published online: 12 May 2022 DOI: 10.1140/epjp/s13360-022-02794-5