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Zschorn S. NONSELFADJOINT DEGENERATE DIFFERENTIAL OPERATOR EQUATIONS OF HIGHER ORDER ON INFINITE INTERVAL. Proc. YSU A: Phys. Math. Sci. [Internet]. 2014 Jul. 10 [cited 2024 Nov. 22];48(2 (234):39-45. Available from: https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol48_no2_2014_pp039-045