Gnitko, V., Degtyarev, K., Doroshenko, V. and Krutchenko, D. (2023) “Spectral boundary value problem for coaxial shells of revolution”, Bulletin of V.N. Karazin Kharkiv National University, series «Mathematical modeling. Information technology. Automated control systems», 60, pp. 6-14. doi: 10.26565/2304-6201-2023-60-01.