Hammel, H.B.; Sromovsky, L.A.; Fry, P.M.; Rages, K.; Showalter, M.; de Pater, I.; van Dam, M.A.; LeBeau, R.P.; Deng, X. (May 2009). "The Dark Spot in the atmosphere of Uranus in 2006: Discovery, description, and dynamical simulations". Icarus. 201 (1): 257–271. Bibcode:2009Icar..201..257H. doi:10.1016/j.icarus.2008.08.019. ISSN0019-1035.
Hammel, H.B.; Sromovsky, L.A.; Fry, P.M.; Rages, K.; Showalter, M.; de Pater, I.; van Dam, M.A.; LeBeau, R.P.; Deng, X. (May 2009). "The Dark Spot in the atmosphere of Uranus in 2006: Discovery, description, and dynamical simulations". Icarus. 201 (1): 257–271. Bibcode:2009Icar..201..257H. doi:10.1016/j.icarus.2008.08.019. ISSN0019-1035.
Hammel, H.B.; Sromovsky, L.A.; Fry, P.M.; Rages, K.; Showalter, M.; de Pater, I.; van Dam, M.A.; LeBeau, R.P.; Deng, X. (May 2009). "The Dark Spot in the atmosphere of Uranus in 2006: Discovery, description, and dynamical simulations". Icarus. 201 (1): 257–271. Bibcode:2009Icar..201..257H. doi:10.1016/j.icarus.2008.08.019. ISSN0019-1035.