Cheremnikh, Evhen, Halyna Ivasyk, Vladislav Alieksieiev, Mariia Kuchma, and Oksana Brodyak. 2018. “Construction of Spectral Decomposition for Non-Self-Adjoint Friedrichs Model Operator”. Eastern-European Journal of Enterprise Technologies 4 (4 (94):6-18. https://doi.org/10.15587/1729-4061.2018.140717.