HOXHA, I., BRAHA, N. L. and TATO, A. (2019) “Properties of absolute-∗-k-paranormal operators and contractions for ∗-A(k) operators”, Studia Universitatis Babeș-Bolyai Mathematica, 64(1), pp. 119–132. doi: 10.24193/subbmath.2019.1.11.