1. Chronic periodontitis;Dreyer;J. Dent. Ass. S. Afr.,1967
2. Response of the jaw bones of the rat to forces transmitted through the molar teeth during mastication;Dreyer,1967
3. The effect of root fractures on the epithelial attachment;Dreyer;J. Dent. Ass. S. Afr.,1967
4. Tooth mobility and microscopic changes produced by occlusal trauma;Mühlemann;Helv. Odont. Acta,1961