- Yu. A. Kordyukov, B. Helffer, “Periodic magnetic Schrödinger operators: Spectral gaps and tunneling effect”, Proc. Steklov Inst. Math., 261, № 1, 2008, 171
- B. Helffer, Y.A. Kordyukov, “Spectral gaps for periodic Schrödinger operators with hypersurface magnetic wells: Analysis near the bottom”, Journal of Functional Analysis, 257, № 10, 2009, 3043
- Matthias Ludewig, Elke Rosenberger, “Asymptotic eigenfunctions for Schrödinger operators on a vector bundle”, Rev. Math. Phys., 32, № 07, 2020, 2050020
- Markus Klein, Elke Rosenberger, “The tunneling effect for Schrödinger operators on a vector bundle”, Anal.Math.Phys., 11, № 2, 2021, 59