Action of the mobius group ¨ M = hx, y : x 2 = y 6 = 1i on certain real quadratic fields. Punjab Univ. J. Math. [Internet]. 2012 Dec. 31 [cited 2025 Jun. 29];44(1):29-35. Available from: https://pujm.pu.edu.pk/index.php/pujm/article/view/4