Team, S. “Finding the Number of Cycle Egamorphisms: Paichayon Sirisathianwatthana, Nirutt Pipattanajinda”.
Thai Journal of Mathematics
, vol. 8, no. 4, Dec. 2010, pp. 1-9, https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/230.