, 2019, Modus vivendi and political legitimacy, in J. Horton, M. Westphal & U. Willems (eds.), The political theory of modus vivendi, Dordrecht, Springer, pp. 131-148.
with Westphal, M. , Willems, U. (eds) , 2019a, The political theory of modus vivendi, Springer, Dordrecht.