This publication is cited in the following articles:
M. F. Gamal', “Notes on the codimension one conjecture in the operator corona theorem”, J. Math. Sci. (N. Y.), 229:5 (2018), 506–517
M. F. Gamal', “On a class of $C_{\cdot0}$-contractions: hyperinvariant subspaces and intertwining operators”, J. Math. Sci. (N. Y.), 134:4 (2006), 2263–2271
M. F. Gamal', “$C_0$-contractions: the Jordan model and lattices of invariant subspaces”, St. Petersburg Math. J., 15:5 (2004), 773–793