This paper shows some properties of dual split quaternion numbers and expressions of power series in dual split quaternions and provides differential operators in dual split quaternions and a dual split regular function on that has a dual split Cauchy-Riemann system in dual split quaternions.
Ji Eun Kim. Kwang Ho Shon. "The Regularity of Functions on Dual Split Quaternions in Clifford Analysis." Abstr. Appl. Anal. 2014 (SI14) 1 - 8, 2014. https://doi.org/10.1155/2014/369430