Brown DM, Michels M, Kaiser PK, Heier JS, Sy JP, Ianchulev T (January 2009). "Ranibizumab versus verteporfin photodynamic therapy for neovascular age-related macular degeneration: Two-year results of the ANCHOR study". Ophthalmology. 116 (1): 57–65.e5. doi:10.1016/j.ophtha.2008.10.018. PMID19118696.
Brown DM, Michels M, Kaiser PK, Heier JS, Sy JP, Ianchulev T (January 2009). "Ranibizumab versus verteporfin photodynamic therapy for neovascular age-related macular degeneration: Two-year results of the ANCHOR study". Ophthalmology. 116 (1): 57–65.e5. doi:10.1016/j.ophtha.2008.10.018. PMID19118696.