Kamalyan H. OPERATOR ANALOGUE OF BERNSTEIN THEOREM. Proc. YSU A: Phys. Math. Sci. [Internet]. 2014 Apr. 10 [cited 2024 Nov. 22];48(1 (233):16-8. Available from: https://pub.ysu.am/index.php/proceedings-phys-math/article/view/vol48_no1_2014_pp016-018