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James A. Poston Jr.; Ranjani V. Siriwardane; Edward P. Fisher; Angela L. Miltz (2003). "Thermal decomposition of the rare earth sulfates of cerium(III), cerium(IV), lanthanum(III) and samarium(III)" (in en). Applied Surface Science214 (1–4): 83–102. doi:10.1016/S0169-4332(03)00358-1. Bibcode: 2003ApSS..214...83P.