NAVEEN Y. G, A. P. R. S. J. P. P. P. . “A CORRELATION OF SKIN COLOUR WITH AMOUNT AND PATTERN OF GINGIVAL TISSUE PIGMENTATION IN INDIAN SUBJECTS-AN OBSERVATIONAL STUDY”. Indo-European Journal of Dental Therapy and Research, vol. 3, no. 1, Jan. 2015, pp. 246-51, https://ijddmr.org/index.php/iejdtr/article/view/88.