1. Aleff, H.-J. (2002). Die Dimension Zeit im Dienstleistungsmarketing. Wiesbaden: Deutscher Universitätsverlag.
2. Ashenfelter, O., & Card, D. (Eds.). (1999). Handbook of labor economics: 3A and 3B. Amsterdam: North-Holland.
3. Ashenfelter, O., & Layard, R. (Eds.). (1987). Handbook of labor economics: 1 and 2. Amsterdam: North-Holland.
4. Atkinson, A. B., & Sutherland, H. (Eds.). (1988). Tax-benefit models. London: Suntory-Toyota International Centre for Economics and Related Disciplines.
5. Becker, G. S. (1965). A theory of the allocation of time. Economic Journal, 75, 493–517.