Kunin, A., Kravchuk, P., & Belenova, I. (2009). Comparative studies of tooth solid tissues when using fluorinated tooth-paste and paste «R.O.C.S.» with bromeline for hygiene care of oral cavity. Clinical Dentistry (Russia), (1), 40—42. Retrieved from http://www.kstom.ru/ks/article/view/0049-09