Bibcode:2000P&SS...48..617G. doi:10.1016/S0032-0633(00)00039-8. ↑ Richard A. Lovett Saturn Moon Titan May Have Underground Ocean, National Geographic, March 20, 2008 1 2 3 Jia-Rui Cook; Cathy Weselby (2010-06-03). "What is Consuming Hydrogen and Acetylene on Titan?".