1. Peter Barker, “Kepler's Epistemology”, in Daniel A. Di Liscia, Eckchart Kessler and Charlotte Methuen (eds.), Method and Order in Renaissance Philosophy of Nature: The Aristotle Commentary Tradition, Hampshire: Ahsgate, 1997, pp. 355-368.
2. Realism and Instrumentalism in Sixteenth-Century Astronomy: A Reappraisal;Peter Barker;Perspectives on Science,1998
3. Tycho Brahe, Astronomiae Instaur atae Progymnasmata, Uraniborg, 1602.
4. From Emblems t o Diagrams: Kepler's New Pictorial Language of Scientific Representation;Raz Chen Morris;Renaissance Quarterly,2009
5. Pierre Duhem, Sauver les apparenc es, Paris: Vrin, 2004. [1908].