1. Electrical Conduction in Nb2 O 5 ‐ Doped Cerium Dioxide
2. 2R. S. Roth, L. W. Coughanour, E. M. Levin, C. R. Robbins, and F. McMurdie ; p.144 inPhase Diagram for Ceramists . Vol. I . Edited by. Amerttafi Ceramic Society, Columbus, OH, 1964 .
3. 3B. W. King, J. Schulz, E. A. Durbin, W. H. Duckworth, E. M. Levin, C. R. Robbins, and H. F. McMurdie ; p.144 inPhase Diagram of Ceremists , Vol. I . Edited by. American Ceramic Society, Columbus, OH, 1964 .