S. Vijayakumar, C. V. R. Harinarayanan. Total Global Domination in Permutation Graphs. Int. J. Math. And Appl. [Internet]. 2016 Jun. 1 [cited 2024 May 20];4(2 - C):99-103. Available from: http://ijmaa.in/index.php/ijmaa/article/view/1050