Chuiko , S., and O. Nesmelova. 2023. “Periodic Boundary-Value Problem for a Rayleigh-Type Equation Unsolved With Respect to the Derivative”.
Ukrains’kyi Matematychnyi Zhurnal
75 (10): 1429-40.
https://doi.org/10.3842/umzh.v75i10.7362
.