Jin-Sil Yu, Hyun-Ja Jeong, Hye-Jin Kim, Hye-Young Park. “A Study on the Correlation of Oral Microorganisms of Children and Mothers in Day Care Centers”. Annals of the Romanian Society for Cell Biology, Jan. 2021, pp. 778-85, https://www.annalsofrscb.ro/index.php/journal/article/view/170.