1. Review Lecture: The float glass process
2. Mossbauer spectra of tin in binary Si-Sn oxide glasses
3. M.M.A. Karim, PhD thesis, Warwick University, England, 1995
4. D. Holland, M.M. Karim, C.E. Johnson, K.F.E. Williams, J.A. Johnson, in: Fundamentals of Glass Science and Technology, Supp. to Riv. della Staz. Sper. del Vetro, vol. XXIII, 1993, p. 223