Article Baum, Richard (1996)
William Lassell and “the accident of a maid-servant's carelessness” or, Why Neptune was not searched for at Starfield. Journal of the British Astronomical Association (pp. 217-219). (/isis/citation/CBB000074370/) unapi

Article Chapman, Allan (1989)
William Lassell (1799-1880): Practitioner, patron and “grand amateur” of Victorian astronomy. Vistas in Astronomy (pp. 341-370). (/isis/citation/CBB000043495/) unapi

Article Smith, Robert W.; Baum, Richard (1984)
William Lassell and the ring of Neptune: A case study in instrument failure. Journal for the History of Astronomy (pp. 1-17). (/isis/citation/CBB000005135/) unapi

Article Smith, Robert W. (1983)
William Lassell and the discovery of Neptune. Journal for the History of Astronomy (pp. 30-32). (/isis/citation/CBB000004065/) unapi

Article Bennett, J. A. (1981)
A surviving flat from William Lassell's four-foot equatorial Newtonian telescope. Journal for the History of Astronomy (pp. 195-197). (/isis/citation/CBB000018331/) unapi

Article Hetherington, Norriss S. (1979)
Neptune's supposed ring. Journal of the British Astronomical Association (pp. 20-29). (/isis/citation/CBB000014099/) unapi

Article Hoyt, William G. (1978)
Reflections concerning Neptune's “ring”. Sky and Telescope (pp. 284-285). (/isis/citation/CBB000015579/) unapi