Verma, Neha, Vaibhav Awinashe, and Umesh Palekar. 2018. “To Evaluate the Variation in Shade by A Spectrophotometer of Porcelain Fused to Metal Samples With Respect to Repeated Firing and Variation In Lot of Ceramic - An In-Vitro Study”. Journal of Pierre Fauchard Academy (India Section) 27 (2):53-59. https://informaticsjournals.com/index.php/jpfa/article/view/22644.