1. Preparation and Structure of Sodium Lanthanide Orthophosphates, Na3Ln(PO4)2;Kizilyalli,1977
2. Inorg. Chim. Acta;Bamberger;New Preparative Methods and Characterization of Double Phosphates Containing Ce(III) and Alkali Metals: M3Ce(PO4)2,1979
3. Inorg. Mat.;Loshchenov;Use of Physicochemical and Spectroscopic Methods to Investigate Double Rare Earth Orthophosphates,1979
4. I. Mayer, JCPDS-1979, Cards #29-1258A, 29-1251, 29-1261, 29-1209.