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Nimmo, F; Bills, B. G. Shell thickness variations and the long-wavelength topography of Titan. Icarus. 2010, 208 (2): 896–904. Bibcode:2010Icar..208..896N. doi:10.1016/j.icarus.2010.02.020. observations can be explained if Titan has a floating, isostatically-compensated ice shell
Goldreich, Peter M.; Mitchell, Jonathan L. Elastic ice shells of synchronous moons: Implications for cracks on Europa and non-synchronous rotation of Titan. Icarus. 2010, 209 (2): 631–638. Bibcode:2010Icar..209..631G. arXiv:0910.0032. doi:10.1016/j.icarus.2010.04.013. A number of synchronous moons are thought to harbor water oceans beneath their outer ice shells. A subsurface ocean frictionally decouples the shell from the interior