Furthermore, the optimal approximation solution to a given quaternion matrix can be derived. Finally, a numerical example is given to show the efficiency of the presented iterative method. The journal ...

Nira Dyn, David Levin, Iterative Solution of Systems Originating From Integral Equations and Surface Interpolation, SIAM Journal on Numerical Analysis, Vol. 20, No. 2 (Apr., 1983), pp. 377-390 ...