1. Crowding of the dental arches: a longitudinal study of the age period between 6 and 12 years;Berg;European Journal of Orthodontics,1986
2. Intra- and interobserver variation in functional examination of the masticatory system;Carlsson;Swedish Dental Journal,1980
3. Epidemiologic survey of functional conditions of the masticatory system in Belgium children aged 3-6 years;Vis;Community Dental Oral Epidemiology,1984