William Lassel
1983 / William Lassell and the Discovery of Neptune / Robert W. Smith / Journal for the History of Astronomy 14 (1983) p. 30 [lien]
1984 / William Lassell and the Ring of Neptune - a Case Study in Instrumental Failure / R. W. Smith ; R. Baum / Journal for the History of Astronomy 15 (1984) p. 1 [lien]