1. W. F. Giauque and H. L. Johnston, J. Am. Chem. Soc. 50, 3221 (1928).JACSAT0002-7863
2. A. Farkas, Orlhohydrogen, Parahydrogen, and Heavy Hydrogen (Cambridge University Press, Cambridge, England, 1935).
3. R. F. Curl, J. V. V. Kasper, and K. S. Pitzer, J. Chem. Phys. 46, 3220 (1967).JCPSA60021-9606
4. J. A. Glasel, J. Chem. Phys. 33, 252 (1960).JCPSA60021-9606
5. R. L. Redington and D. E. Milligan, J. Chem. Phys. 39, 1276 (1963).JCPSA60021-9606