Eun-Kyoung Han, Yujin Suh. 2021. “Factors Influencing Quality of Sleep of Elderly Persons Based on Theory of Unpleasant Symptoms: The 2018 Nationwide Community Health Survey in Korea”. Annals of the Romanian Society for Cell Biology, January, 1770-81. https://www.annalsofrscb.ro/index.php/journal/article/view/293.