1. Roentgen-ray diffraction studies of enamel and dentine;Bale;Amer. J. Roentgenol.,1934
2. Electron microscopy of enamel and dentin;Bernick;J. Amer. dent. Ass.,1952
3. Histologic phenomena of tooth tissues as observed under polarized light; with a note on the roentgen-ray spectra of enamel and dentin;Cape;J. Amer. dent. Ass.,1930
4. Micro X-ray diffraction on biological materials;Carlström;AdBANc. biol. med. Phys.,1960