M. Fulchignoni; F. Ferri; F. Angrilli; A. Bar-Nun; M.A. Barucci; G. Bianchini et al. (2002). "The Characterisation of Titan's Atmospheric Physical Properties by the Huygens Atmospheric Structure Instrument (Hasi)". Space Science Reviews104 (1): 395–431. doi:10.1023/A:1023688607077. Bibcode: 2002SSRv..104..395F.
M. Fulchignoni; F. Ferri; F. Angrilli; A. Bar-Nun; M.A. Barucci; G. Bianchini et al. (2002). "The Characterisation of Titan's Atmospheric Physical Properties by the Huygens Atmospheric Structure Instrument (Hasi)". Space Science Reviews104 (1): 395–431. doi:10.1023/A:1023688607077. Bibcode: 2002SSRv..104..395F.