1. The fair wage-effort hypothesis and unemployment;Akerlof;Quarterly Journal of Economics,1990
2. Herzberg's two-factor theory;Alshmemri;Life Science Journal,2017
3. The SAGE handbook of current developments in grounded theory;Bryant,2019
4. The development and use of the theory of ERG: A literature review;Caulton;Emerging Leadership Journeys,2012