Hou, Y., Z. Guo, and Q. Zheng. “Subjective Well-Being Among Empty-Nest Elderly and Its Related Factors：Taking Guangdong Province As an Example”. Journal of Geriatric Medicine, vol. 1, no. 3, Aug. 2020, pp. 17-24, doi:10.30564/jgm.v1i3.2225.