WHO burnout https://www.who.int/news/item/28-05-2019-burn-out-an-occupational-phenomenon-international-classification-of-diseases

Rudolph et al. https://doi.org/10.1016/j.jvb.2017.05.008

Vogelsang et al. https://www.laverne.edu/academy/wp-content/uploads/sites/7/2019/03/Vogelsang-Olson-and-Shultz-2018-Emotional-well-being-following-a-later-life-career-change-The-roles-of-agency-and-resources-IJAHD.pdf