1.
Dumanyan V. ON THE BOUNDEDNESS OF A CLASS OF THE FIRST ORDER LINEAR DIFFERENTIAL OPERATORS. Proc. YSU A: Phys. Math. Sci. [Internet]. 2011 Feb. 16 [cited 2024 Nov. 22];45(1 (224):3-6. Available from: https://pub.ysu.am/index.php/proceedings-phys-math/article/view/vol45_no1_2011_pp003-006