Mishra, S. N., and A. Pal. “Regular Interval-Valued Intuitionistic Fuzzy Graphs”. Journal of Informatics and Mathematical Sciences 9, no. 3 (October 31, 2017): 609–621. Accessed April 30, 2024. http://www.rgnpublications.com/journals/index.php/jims/article/view/764.