↑Reisman, Arnold; Holtzberg, Frederic; Berkenblit, Melvin; Berry, Margaret (1956년 9월 20일). “Reactions of the Group VB Pentoxides with Alkali Oxides and Carbonates. III. Thermal and X-Ray Phase Diagrams of the System K2O or K2CO3 with Ta2O5”. 《Journal of the American Chemical Society》 78 (18): 4514–4520. doi:10.1021/ja01599a003.