(Ingelesez)Gibson, Edward G.. (1973). The Quiet Sun. (1st edition. argitaraldia) National Aeronautics and Space Administration, Scientific and Technical Information Office (Noiz kontsultatua: 2018-10-06).
Tso, M. O.; La Piana, F. G.. (1975-11). «The human fovea after sungazing»Transactions. Section on Ophthalmology. American Academy of Ophthalmology and Otolaryngology 79 (6): OP788–795. ISSN0161-6978. PMID1209815. (Noiz kontsultatua: 2018-10-05).
Tso, M. O.; La Piana, F. G.. (1975-11). «The human fovea after sungazing»Transactions. Section on Ophthalmology. American Academy of Ophthalmology and Otolaryngology 79 (6): OP788–795. ISSN0161-6978. PMID1209815. (Noiz kontsultatua: 2018-10-05).