Nesterenko, V. (2011) “Sufficient conditions for the existence of points of symmetric quasicontinuity and of symmetric cliquishness of functions of two variables”, Carpathian Mathematical Publications, 3(2), pp. 114–119. Available at: https://ktipe.pnu.edu.ua/index.php/cmp/article/view/3073 (Accessed: 22 November 2024).