Shakil, Md Mahbubur R, Tapas Debnath, Claus H Ruscher, and Altaf Hussain. “Study of Tantalum Substituted Potassium Tungsten Bronzes”. Journal of the Bangladesh Chemical Society 25, no. 1 (September 3, 2012): 38–45. Accessed May 13, 2024. https://www.banglajol.info/index.php/JBCS/article/view/11770.