The correlation between the DMFT index of 6 year old children and the concentration of fluorine in drinking water from the South-East region of the Republic of Macedonia - Ambarkova V, Jankulovska M, Kokoceva Ivanovska O, Gorgievska A, Mijoska A. (Македонско Стоматолошко Друштво, 2018; 153 OP11, 2018)