Spencer, J. R. (2010. január 22.). „Formation of Iapetus' Extreme Albedo Dichotomy by Exogenically Triggered Thermal Ice Migration”. Science327 (5964), 432–435. o. DOI:10.1126/science.1177132. PMID 20007862.
Spencer, J. R. (2010. január 22.). „Formation of Iapetus' Extreme Albedo Dichotomy by Exogenically Triggered Thermal Ice Migration”. Science327 (5964), 432–435. o. DOI:10.1126/science.1177132. PMID 20007862.