Lecian, O. M. (2023). The Desymmetrized PSL(2,Z) Group, The ‘Square Box’ Congruence Subgroup, The Congruence Subgroups and Leaky Tori. International Journal Of Mathematics And Computer Research, 11(1), 3195-3200. https://doi.org/10.47191/ijmcr/v11i1.12