RAJAE BEN TAHER, and J. ABDERRAHMAN MARRERO, and Y. ELKHATABI, and M. RACHIDI, (2014) On explicit formulas of the principal matrix $p$-th root by polynomial decompositions. Applied mathematics and Computation Volume 242, September 2014, p 435-443.

RAJAE BEN TAHER, and Y. ELKHATABI, and M. RACHIDI, (2014) Some Formulas for the Principal for the principal matrix $p$-th root. International Journal of Contemporary Mathematical Sciences, Vol. 9, no. 3 (2014) 141 - 152.