Abbas M, Parvaneh V, Razani A. A common fixed point for generalized (ψ, φ)<sub><i>f,g</i></sub> - weak contractions. Ukr. Mat. Zhurn. [Internet]. 2011Nov.25 [cited 2024Nov.23];63(11):1544-5. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2824