1. A dictionary of epidemiology;Last,1988
2. Kaiser Permanente Northwest Region,1994
3. Factors related to loss of root canal treated teeth;Caplan;Dissertation. Chapel Hill, NC: University of North Carolina,1995
4. Clinical efficacy trials with categorical data;Koch,1988
5. Technical quality of root fillings in an adult Swedish population;Petersson;Endod Dent Traumatol,1986