Khanna, T., Gurav, S., IV, R. and DB, N. 2018. Influence Of Porcelain Thickness And Repeated Firings On The Color Of Metal - Ceramic Restorations - An In Vitro Study: Influence of Porcelain Thickness & Repeated Firings On The Color Of Metal - Ceramic Restorations. National Journal of Integrated Research in Medicine. 7, 4 (Jan. 2018), 132–139.