Abdullah, A. M., Debnath, T., Rüscher, C. H., & Hussain, A. (2012). Synthesis and Characterization of Vanadium Substituted Potassium Tungsten Bronzes, K<sub>x</sub>V<sub>y</sub>W<sub>1-y</sub>O<sub>3</sub>. Journal of Scientific Research, 4(2), 507. https://doi.org/10.3329/jsr.v4i2.9349