1. Titan's atmosphere and climate
2. http://www.esa.int/Our_Activities/Space_Science/Cassini–Huygens/The_mission
3. https://saturn.jpl.nasa.gov/ & https://saturn.jpl.nasa.gov/science/titan/
4. Titan from Cassini–Huygens , ed. R. H. Brown , J. P. Lebreton and J. H. Waite , Springer , 2010
5. F. Raulin , C.McKay , J.Lunine and T.Owen , Titan's astrobiology, in Chapter 9 of the Springer 2010 book cited in ref. 4