1. V. A. Steklov, General Methods of Solution of Basic Problems in Mathematical Physics [in Russian] Thesis, Kharkov (1901).
2. T. A. Mel’nyk, “Asymptotic behavior of eigenvalues and eigenfunctions of the Steklov problem in a thick periodic junction,” Nonlinear Oscillat. 4, No. 1, 91–105 (2001).
3. M. E. Pérez, “On periodic Steklov type eigenvalue problems on half-bands and the spectral homogenization problem,” Discrete Contin. Dyn. Syst. Ser. B. 7, No. 4, 859–883 (2007).
4. S. A. Nazarov and J. Taskinen, “On the spectrum of the Steklov problem in a domain with a peak” [in Russian], Vestnik St. Peterb. Univ. Ser. 1, No. 1, 56–65 (2008); English transl.: 41 (1, 2008): 45–52.
5. S. A. Nazarov, “On the spectrum of the Steklov problem in peak-shaped domains” [in Russian], Tr. St. Peterb. Mat. O-va 14, 103–168 (2008); English transl.: Translations. Series 2. Am. Math. Soc. 228, 73–131 (2009).