The internal and translational energy dependence of molecular condensation coefficients: SF6 and CCl4, Sibener SJ, Lee YT, American Institute of Physics, J. Chem. Phys., Volume 101, Number 2, 7/15/1994
Possibilities for Bose condensation of Positronium, Mills AP, Platzman PM, Physical Review B, Volume 49, Number 1, pp. 454-458 , 1/1/1994