Adams, J.C. (1846). "On the Perturbations of Uranus (p. 265)". Appendices to various nautical almanacs between the years 1834 and 1854 (reprints published 1851) (note that this is a 50Mb download of the pdf scan of the nineteenth-century printed book). UK Nautical Almanac Office. Retrieved 2008-01-23.
Adams's final prediction on 2 September 1846 was for a true longitude of about 3151⁄3 degrees. That was 12 degrees west of Neptune. The large error was first emphasized in D. Rawlins (1969). "Review of Colin Ronan Astronomers Royal". Sky and Telescope. 38: 180–182. Adams's exact calculation of his prediction of 3151⁄3 degrees was recovered in 2010.
Kollerstrom, N. (2001). "A Neptune Discovery Chronology". The British Case for Co-prediction. University College London. Archived from the original on 2005-11-19. Retrieved 2007-08-23.
Kollerstrom, N. (2001). "Challis' Unseen Discovery". The British Case for Co-prediction. University College London. Archived from the original on 2005-02-06. Retrieved 2007-08-23.
Kollerstrom, N. (2001). "A Neptune Discovery Chronology". The British Case for Co-prediction. University College London. Archived from the original on 2005-11-19. Retrieved 2007-08-23.
Kollerstrom, N. (2001). "Challis' Unseen Discovery". The British Case for Co-prediction. University College London. Archived from the original on 2005-02-06. Retrieved 2007-08-23.