1. Allegrini, M., Bicchi, P. and Gozzini, S., 9th International Conference on Atomic Physics, Seattle, 1984, abstracts, p. B69.
2. The possibility of suppressing dimer formation by optical pumping was earlier mentioned by R. A. Bernheim, in his book Optical Pumping, W. A. Benjamin. N.J. (1965) p. 64.
3. The possible superfluid behaviour of hydrogen atom gases and liquids