Molek, Mangatas Hutagalung, and Aldi H. Theo Braga Bangun, “The Relationship Between Toothbrushing Habits and the Prevalence of Caries and Calculus in School-Age Children Grades 1-6 at Galilea Hosana School Elementary School, Medan Selayang District of North Sumatra, Indonesia ”, CMEJ, vol. 5, no. 1, pp. 410-414, Dec. 2023.