, 2019, The Marxian legacy: the search for the new left, Springer, Dordrecht.
, 2011, 'Claude Lefort: A political biography', Continental Philosophy Review 44 (2), 145-150.
, 1994, Revolution as the foundation of political philosophy, in T. Engelhardt & T. Pinkard (eds.), Hegel reconsidered, Dordrecht, Springer, pp. 187-209.
, 1985, 'Kant's system and (its) politics', Man and World 18 (1), 79-98.
, 1965a, 'Phenomenology and/or psychology', Review of Existential Psychology and Psychiatry 5, 239-263.