Kiselnikova L.P., Tsarev V.N., Toma E.I., Podporin M.S. Microbiocenosis of the oral cavity of children: clinical and microbiological characteristics and correction with probiotics based on salivary streptococci. Clinical Dentistry (Russia).  2021; 24 (4): 24—29. DOI: 10.37988/1811-153X_2021_4_24