For citations:

Lukyanov V.D., Bulekbaev D.A., Morozov A.V., Nosova L.V. Approximate analytical method for finding eigenvalues of Sturm-Liouville problem with generalized boundary condition of the third kind. Nanosystems: Physics, Chemistry, Mathematics. 2020;11(3):275–284. https://doi.org/10.17586/2220-8054-2020-11-3-275-284