G. Pfyffer

Librations and obliquity of Mercury from the BepiColombo radio-science and camera experiments

V. Dehant, T. Hoolst, G. Pfyffer, 2011, 1104.5153.

Mercury libration determination and the link with the interior of the planet

V. Dehant, A. Rivoldini, N. Rambaux, 2006 .