1. Leko, V.K., Viscosity of silica glasses: A review, Fiz. Khim. Stekla, 1979, vol. 5, no. 3, pp. 258–278.
2. Hagy, H.E., Experimental evaluation of beam-bending method of determination glass viscosities in range 108−1015 poises, J. Am. Ceram. Soc., 1963, vol. 46, no. 2, pp. 93–97.
3. Volarovich, M.P. and Leont’eva, A.A., Determination of the viscosity of silica glasses in the softening region, Zh. Fiz. Khim., 1936, vol. 8, no. 3, pp. 335–343.
4. Nemilov, S.V., Theoretical and experimental justification of the method for measurement of the viscosity of glasses on the basis of the indentation of solid indenters into a glass plate, Fiz. Khim. Stekla, 1977, vol. 3, no. 2, pp. 148–157.
5. Klyuev, V.P., Measurements of the viscosity of glasses by means of the indentation of a conical indenter into thin glass plates, Glass Phys. Chem., 2001, vol. 27, no. 5, pp. 418–424.