1. 38Ian: A. Iandelli, “Crystal Structure of Alloys Composed of Intermetallic Compounds of the Rare-Earth Elements,” Atti 10th Congr. Int. Chim. Rome,2, 688–694 (1938) in Italian.
2. 43Vog: R. Vogel and T. Heumann, “Contributions to the Knowledge of the Metals and Alloys of the Rare Earths,”Z. Metallkd., 35, 29–42 (1943).
3. 59Dwi: A. E. Dwight and M. V. Nevitt, “Studies on Transition Metal Intermediate Phases,” ANL-6099, Argonne National Laboratory, Argonne, IL (1959).
4. 60Ian: A. Iandelli, “Intermetallic and Metalloid Gadolinium Compounds,”Atti Accad. Naz. Lincei Rend., Cl. Sci. Fis. Mat. Nat., 29, 62 (1960) in Italian.
5. 63Olc: G. L. Olcese, “Sul Comportamento Magnetico del Cerio Nei Composti Intermetallici-I. I. Sistemi Ce−Cu, Ce−Ag, Ce−Au,”Atti Accad. Naz. Lincei Rend., Cl. Sci. Fis. Mat. Nat., 34, 642 (1963).