V. J. Kaneria, M. M. Jariya, H. M. Makadia. Graceful labeling of arrow graphs and double arrow graphs. Malaya J. Mat. [Internet]. 2015 Oct. 1 [cited 2024 Jul. 16];3(04):382-6. Available from: https://www.malayajournal.org/index.php/mjm/article/view/487