1. Arrow, K.J. 1951. Social choice and individual values. New York: Wiley.
2. Brogan, A.P. 1919. The fundamental value universal. Journal of Philosophy 6(4): 967–1104.
3. Chisholm, R.M. 1975. The intrinsic value of disjunctive states of affairs. Noûs 9(3): 295–308.
4. Chisholm, R.M., and E. Sosa. 1966. On the logic of ‘intrinsically better’. American Philosophical Quarterly 3(3): 244–249.
5. Danielsson, S. 1968. Preference and obligation. Uppsala: Scriv Service.