Vasylyshyn T. Continuous block-symmetric polynomials of degree at most two on the space $(L_\infty)^2$. Carpathian Math. Publ. [Internet]. 2016 Jun. 30 [cited 2024 Apr. 26];8(1):38-43. Available from: https://scijournals.pnu.edu.ua/index.php/cmp/article/view/1412