1. On the original rock source of tektites;Bouska;Lithos,1968
2. A semi-quantitative asteroid impact hypothesis of tektite origin;Cohen;J. Geophys. Res.,1961
3. The petrographic and chemical characteristics of tektites;Chao,1963
4. Chemical composition of Ries glass bombs;Engelhardt;Geochim. Cosmochim. Acta,1967
5. Riesgläser und moldavite;Engelhardt;Geochim. Cosmochim. Acta,1965