Matichescu, Anamaria, et al. “Oral Hygiene Behaviour. Case Study of Primary School Children from Timis County”. Revista de Cercetare Si Interventie Sociala, vol. 54, Sept. 2016, pp. 142-55, https://www.rcis.ro/journal/article/view/2292-oral-hygiene-behaviour-case-study-of-primary-school.