1. Aristotle (384-22 BCE). (1961). Physics. Transl. J. Hope. Lincoln: University of Nebraska Press.
2. Barwise, J., & Etchemendy, J. (1987). The liar: an essay on truth and circularity. New York: Oxford University Press.
3. Barwise, J., & Moss, L. (1996). Vicious circles: on the mathematics of non-wellfounded phenomena. Stanford: CSLI Publications.
4. Black, O. (1996). Infinite regress arguments and infinite regresses. Acta Analytica, 16, 95–124.
5. Creswell, M. J., & Hughes, E. M. (1996). A new introduction to modal logic. London: Routledge.