1. World happiness report 2022;Helliwell,2022
2. Diving into happiness;Marks;Resurgence Ecol,2012
3. Research on the impact of work flexibility on employee happiness-based on the perspective of ecological balance theory;Xing,2021
4. Happiness level prediction with sequential inputs via multiple regressions;Li,2016
5. Facial image analysis: recent trends and approaches;S;Int J Adv Res Comput Commun Eng,2016