1. J. H. Vleck, On the isotope corrections in molecular spectra, J. Chem. Phys.
4, 327–338 (1936).
2. M. Born and K. Huang, Dynamical Theory of Crystal Lattices, pp. 406–407, Oxford University Press, New York (1956).
3. W. Kolos and L. Wolniewicz, Accurate adiabatic treatment of the ground state of the hydrogen molecule, J. Chem. Phys.
41, 3663–3673 (1964).
4. J. D. Garcia, Radiative corrections to the energies of atoms and molecules, Phys. Rev.
147, 66–68 (1966).
5. N. F. Ramsey, Molecular Beams, Oxford University Press, New York (1956).