Tepoyan L. NONSELFADJOINT DEGENERATE DIFFERENTIAL EQUATIONS OF HIGHER ORDER. Proc. YSU A: Phys. Math. Sci. [Internet]. 2014 Jul. 10 [cited 2024 Nov. 22];48(2 (234):24-9. Available from: https://pub.ysu.am/index.php/proceedings-phys-math/article/view/vol48_no2_2014_pp024-029