libration
2001 / Les danses spatiales de la Lune / Éric Bois / Pour la Science 285 (2001) p. 52 [lien]
2011 / Libration of the Moon, Hevelius's Theory, and its Early Reception in England / Jaroslaw Wlodarczyk / Journal for the History of Astronomy 42 (2011) p. 495 [lien]
2011 / The Selenographia of William Gilbert: His Pre-telescopic Map of the Moon and his Discovery of Lunar Libration / Stephen Pumfrey / Journal for the History of Astronomy 42 (2011) p. 193 [lien]