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R. H. Haghi, Sh. Rezapour and N. Shahzad, “Some Fixed Point Generalizations Are Not Real Generalizations,” Non-linear Analysis: Theory, Methods & Applications, Vol. 74, No. 5, 2011, pp. 1799-1803. doi:10.1016/j.na.2010.10.052

has been cited by the following article:

• TITLE: Fixed Point and Common Fixed Point Theorems for Cyclic Quasi-Contractions in Metric and Ultrametric Spaces

  AUTHORS: Parin Chaipunya, Yeol Je Cho, Wutiphol Sintunavarat, Poom Kumam

  KEYWORDS: Cyclic Quasi-Contraction; Co-Cyclic Quasi-Contraction; Metric Space; Ultrametric Space

  JOURNAL NAME: Advances in Pure Mathematics, Vol.2 No.6, November 13, 2012

  ABSTRACT: In this paper, we prove introduce some fixed point theorems for quasi-contraction under the cyclical conditions. Then, we point out that a common fixed point extension is also applicable via our earlier results equipped together with a weaker cyclical properties, namely a co-cyclic representation. Examples are as well provided along this paper.