1. S.D. Stookey, a) J. Am. Ceram. Soc. 32, 246 (1949).
2. S.D. Stookey, b) Ind. Eng. Chem. 41, 856 (1949).
3. H. Nordenson, Z. Phys. Chem. 90, 603 (1915).
4. W.A. Weyl and E. C. Marboe, The Constitution of Glasses, A Dynamic Interpretation, Vol. II, page 723, Interscience Publishing Company, New York 1964.
5. J.A. Hedvall, Ber. Deutsch. Chem. Ges. 45, 2095 (1912).