Harun Achmad, Helmy Siswanto Hasbi. 2021. “Gingival Health and Oral Hygiene Measures Among Junior High School Children During the Covid-19 Pandemic: A Systematic Review”. Annals of the Romanian Society for Cell Biology, February, 4783-99. https://www.annalsofrscb.ro/index.php/journal/article/view/624.