1. 1. Sugiantari A, Budiantara I. Analysis of factors influencing life expectancy in East Java using semiparametric spline regression. J Sains dan Seni ITS 2013;2(1):2337–3520. DOI: 10.12962/j23373520.v2i1.3132
2. 2. Mahdi M. Indonesia's Life Expectancy Reaches 73.5 Years in 2021 [Internet]. 2022. [cited 2022 April 30]. Available from: https://dataindonesia.id/ragam/detail/angka-harapan-hidup-indonesia-capai-735-tahun-pada-2021. Indonesian.
3. 3. Ministry of Health Republic of Indonesia. Indonesia Enters the. Aging Population Period [Internet]. 2019. [cited 2022 April 30]. Available from: https://www.kemkes.go.id/article/view/19070500004/indonesia-masuki-periode-aging-population.html. Indonesian.
4. 4. Pindobilowo. The influence of oral hygiene on malnutrition in the elderly (Literature. Review). JITEKGI 2018;14(1):1–5.
5. 5. Ministry of Health Republic of Indonesia. Basic Health Research. Indonesia; 2018. 206–207. Indonesian.