Bản mẫu:Chú thích DOI/10.1006.2Ficar.2001.6599
Karkoschka, Erich (2001). “Uranus' Apparent Seasonal Variability in 25 HST Filters”. Icarus. 151 (1): 84–92. Bibcode:2001Icar..151...84K. doi:10.1006/icar.2001.6599.
Karkoschka, Erich (2001). “Uranus' Apparent Seasonal Variability in 25 HST Filters”. Icarus. 151 (1): 84–92. Bibcode:2001Icar..151...84K. doi:10.1006/icar.2001.6599.