Generalized quaternions and their relations with Grassmann-Clifford   procedure of doubling
  The class of non-commutative hypercomplex number systems (HNS) of 4-dimension, constructed by using of non-commutative Grassmann-Clifford procedure of doubling of 2-dimensional systems is investigated in the article and established here are their relationships with the generalized quaternions. Algorithms of performance of operations and methods of algebraic characteristics calculation in them, such as conjugation, normalization, a type of zero divisors are investigated. The considered arithmetic and algebraic operations and procedures in this class HNS allow to use these HNS in mathematical modeling. 
Yakiv O. Kalinovsky, Yuliya E. Boyarinova, Alina S. Turenko, Yana V.   Khitsko
cs.NA math.CV