Abstract
In this note, we give a counterexample and modification of Lemma 4.4 (ii) in [Citation1]. Moreover, the validity of Theorem 4.6 in [Citation1] is confirmed without using Lemma 4.4 in its proof.
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Acknowledgments
The author wishes to express his thanks to his Prof. Refaat Salem also G. Birkenmeier and B. Heider the authors of [Citation1] for their suggested revisions, several helpful comments and advice. As the author appreciates the helpful comments from the referee.