1. R. Cohen, U. Hauser, R.L. Mössbauer, in Recoilless Resonant Absorption in Nuclear Transitions of the Rare Earths, ed. by D.M.J. Compton, A.H. Schoen. The Mössbauer Effect (Wiley, New York, 1962), p. 172
2. R.G. Barnes, E. Kankeleit, R.L. Mössbauer, J.M. Poindexter, Electronic shielding of the crystalline field in thulium ethyl sulfate. Phys. Rev. Lett. 11, 253 (1963)
3. M.J. Clauser, E. Kankeleit, R.L. Mössbauer, Pseudoquadrupole shift of gamma resonance spectra. Phys. Rev. Lett. 17, 5 (1966)
4. A.J. Bearden (ed.), Third international conference on the Mössbauer effect. Rev. Modern Phys. 36, 333–503 (1964)
5. G.K. Wertheim, Mössbauer Effect: Principles and Applications (Academic, New York, 1964)