Abdullah, A. M., T. Debnath, C. H. Rüscher, and A. Hussain. 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.