TY - JOUR AU - Ruiz PĂ©rez, Javier PY - 2001 SN - 0028-0836 UR - https://hdl.handle.net/20.500.14352/56768 T2 - Nature (London) LA - eng M2 - 409 PB - Macmillan KW - GeoplanetologĂ­a KW - Callisto TI - The stability against freezing of an internal liquid-water ocean in Callisto TY - journal article VL - 412 ER -