H. Abood, E. and Al-loz, M. A. (2016) “On some generalizations of (n,m)- normal powers operators on Hilbert space”, Journal of Progressive Research in Mathematics, 7(3), pp. 1063-1070. Available at: http://scitecresearch.com/journals/index.php/jprm/article/view/716 (Accessed: 6May2024).