Baranetskij, Ya.O., I.I. Demkiv, I.Ya. Ivasiuk, and M.I. Kopach. 2018. “The Nonlocal Problem for the $2n$ Differential Equations With Unbounded Operator Coefficients and the Involution”. Carpathian Mathematical Publications 10 (1):14-30. https://doi.org/10.15330/cmp.10.1.14-30.