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  1. On surrounding quasi-contractions on non-triangular metric spaces

    Article • Open Mathematics, October 2020, De Gruyter

    Prof. Erdal KARAPINAR, Zoran Mitrovic, Dr Vladimir Rakocevic, Farshid Khojasteh

  2. Scrutiny of some fixed point results by S-operators without triangular inequality

    Article • Mathematica Slovaca, April 2020, De Gruyter

    Farshid Khojasteh