Figueroa, Rafael, Satoshi Seino, Noriko Yabushita, Yoshiro Okubo, Miyuki Nemoto, Songee Jung, and Kiyoji Tanaka. “Cross-Validity and Reliability of the Age Scale for Assessing Activities of Daily Living Among Japanese Community-Dwelling Adults Aged 75 Years or Older”. Journal of Aging and Gerontology 3, no. 1 (March 24, 2015): 17–23. Accessed March 17, 2025. https://savvysciencepublishers.com/index.php/jag/article/view/243.