In vitro assessment of casein phosphopeptide-amorphous calcium phosphate (cpp-acp) to prevent white spot lesion - E. Zabokova Bilbilova, A. Sotirovska – Ivkovska, M. Igic, A. Mijoska, N. Stavreva, V. Spirov, B. Evrosimovska, K. Pecakov. (Acta Stomatologica Naissi, 2019)