1. Akhiezer, N.I., Glazman, I.M.: Theory of Linear Operators in Hilbert Space. Translated from the Russian and with a Preface by Merlynd Nestell, Reprint of the 1961 and 1963 Translations, Two Volumes Bound as One. Dover Publications Inc., New York (1993)
2. Barbaroux, J.M., Combes, J.M., Hislop, P.D.: Localization near band edges for random Schrödinger operators. Papers Honouring the 60th Birthday of Klaus Hepp and of Walter Hunziker, Part II (Zürich, 1995). Helv. Phys. Acta 70(1–2), 16–43 (1997)
3. Berezans’kiĭ, J.M.: Expansions in Eigenfunctions of Selfadjoint Operators. Translated from the Russian by R. Bolstein, J. M. Danskin, J. Rovnyak and L. Shulman. Translations of Mathematical Monographs, vol. 17. American Mathematical Society, Providence, R.I. (1968)
4. Birman, M.S., Solomjak, M.Z.: Spectral Theory of Selfadjoint Operators in Hilbert Space. Mathematics and Its Applications (Soviet Series). Translated from the 1980 Russian Original by S. Khrushchëv, V. Peller. D. Reidel Publishing Co., Dordrecht (1987)
5. Combes, J.M., Thomas, L.: Asymptotic behaviour of eigenfunctions for multiparticle Schrödinger operators. Commun. Math. Phys. 34, 251–270 (1973)