1. Beaney, M. (Ed.). (1997). The Frege reader. Oxford: Blackwell.
2. Button, T. (2010). Dadaism: Restrictivism as militant quietism. Proceedings of the Aristotelian Society, 110, 387–98.
3. Dolby, D. (2009). The Reference Principle: A defence. Analysis, 69, 286–296.
4. Dudman, V. (1976). Bedeutung for predicates. In M. Schirn (Ed.), Studien zu Frege (pp. 71–84). Stuttgart: Frommann Holzboog.
5. Dummett, M. (1981a). Frege: Philosophy of language (2nd ed.). Londond: Duckworth.