Mahmood Kamil Shihab 2023. Generalization of Fuglede-Putnam Theorem to (p, q)−Quasiposinormal Operator and (p, q)− Co-posinormal Operator. Tikrit Journal of Pure Science. 21, 3 (2023), 184–186. DOI:https://doi.org/10.25130/tjps.v21i3.1014.