Pooja Goel, N. N. A. S. N. G. S. M. . “To Compare Different Methods of Shade Matching of Anterior Teeth for Color Evaluation”. Annals of the Romanian Society for Cell Biology, vol. 25, no. 6, May 2021, pp. 2674-9, https://www.annalsofrscb.ro/index.php/journal/article/view/5892.