2 citations to https://www.mathnet.ru/rus/znsl4615

1. Sergei A. Nazarov, Keijo M. Ruotsalainen, “Curved channels with constant cross sections may support trapped surface waves”, Z. Angew. Math. Phys., 74:4 (2023)  
2. Piat V.Ch. Nazarov S.A. Taskinen J., “Embedded Eigenvalues Forwater-Waves in Athree-Dimensional Channel With Athin Screen”, Q. J. Mech. Appl. Math., 71:2 (2018), 187–220