https://fr.wikipedia.org/wiki/Esth%C3%A9tique_analytique#Wittgenstein_et_l'art_conceptuel
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-Timothy M. Costelloe, The British Aesthetic Tradition. From Shaftesbury to Wittgenstein,
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-Timothy M. Costelloe, The British Aesthetic Tradition. From Shaftesbury to Wittgenstein,