Note 173 — Chapter IX · GENERAL PROPERTIES OF THE CERIUM AND YTTRIUM GROUPS
Reading edition
Urbain, Bull. Soc. chim. 1897, [iii.], 17, 98; Urbain and Budischofsky, Compt. rend. 1897, 124, 618; Biltz and Clinch, Zeitsch. anorg. Chem. 1904, 40, 218.
[174] Annalen, 1904, 331, 334.