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Preliminary remarks on a theory of legal normativityIn Jerzy Stelmach & Bartosz Brożek (eds.), The normativity of law, Copernicus Center Press. 2011.
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Between reason and strategy : some reflections on the normativity of proportionalityIn Grant Huscroft, Bradley W. Miller & Grégoire C. N. Webber (eds.), Proportionality and the Rule of Law: Rights, Justification, Reasoning, Cambridge University Press. 2014.
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Why is willing irrelevant to the grounding of (any) obligation? : remarks on Arthur Ripstein's conception of omni-lateral willingIn Sari Kisilevsky & Martin Jay Stone (eds.), Freedom and Force: Essays on Kant’s Legal Philosophy, Bloomsbury Academic. 2017.
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Non-naturalism, normativity and the meaning of ought : some lessons from kelsenIn Kenneth Einar Himma, Miodrag A. Jovanović & Bojan Spaić (eds.), Unpacking Normativity - Conceptual, Normative and Descriptive Issues, Hart Publishing. 2018.