1. Investigation of the Phase Composition of the La2O3-Ta2O5 System;Afonskii;Inorg. Mater.,1967
2. The System Eu2O3-Ta2O5;Pinaeva;Inorg. Mater.,1968
3. Ta2O5-Gd2O3 System;Timofeeva;Russ. J. Inorg. Chem.,1970
4. Study of the Interaction of Terbium Oxide with Niobium Pentoxide and Tantalum Pentoxide;Isupova;Izv. Akad. Nauk SSSR, Neorg. Mater.,1980
5. Reaction of Tantalum Pentoxide with Erbium Oxide;Isupova;Inorg. Mater.,1975