Torres del Castillo, G. F., and K. C. Gutiérrez-Herrera. “Double and Dual Numbers. SU(2) Groups, Two-Component Spinors and Generating Functions”. Revista Mexicana De Física, vol. 66, no. 4 Jul-Aug, July 2020, pp. 418-23, doi:10.31349/RevMexFis.66.418.