Maryam Adnan AL-Ethary, Maryam Sabbeh Al-Rubaie, and Maha Khalid Kadhim. “Graph Functions in Terms of ‘Gem-Sets’”. International Journal of Scientific Trends, vol. 2, no. 3, Mar. 2023, pp. 1-11, https://scientifictrends.org/index.php/ijst/article/view/70.