1. Electron microscopy of dental calculus;Gonzales;Science N.Y.,1960
2. Uber den Zahnstein 1. Mitteclung;Höhling;Dt. Zahnärztebl.,1962
3. The inorganic composition of dental calculus;Rowles,1964
4. Two different types of mineralisation in early dental calculus;Schroeder;Helv. odont. Acta,1964
5. Crystal morphology and gross structures of mineralising plaque and of calculus;Schroeder;Helv. odont. Acta,1965