The foundation of presocratic atomism: the argument of De generatione et corruptione A.2 / Pieter Sjoerd HasperFilosofie in tweeduizend en vierenvijftig lemmata : [reviewartikel over: E. Craig (ed.). Routledge encyclopedia of philosophy] / Pieter Sjoerd HasperA platonic account of ekthesis : evidence and problems / Pieter Sjoerd HasperThe metaphysics of continuity: Zeno, Democritus and Aristotle / Pieter Sjoerd HasperThe metaphysics of continuity: Zeno, Democritus and Aristotle / Pieter Sjoerd Hasper