https://www.scirp.org/reference/ReferencesPapers?ReferenceID=2249204
Ammar, A.A., El-Mallwany, R.A. and El-Zaidia, M.M. (1985) Infra-Red Spectra, Electronspin Resonance...
Ammar, A.A., El-Mallwany, R.A. and El-Zaidia, M.M. (1985) Infra-Red Spectra, Electronspin Resonance Spectra, and Density of (TeO2)100-x-(WO3)x and (TeO2)100-x-...