EXPLICIT COMPUTATION OF COMMUTATOR SUBGROUPS IN SIX-DIMENSIONAL TORSION-FREE BIEBERBACH GROUPS WITH QUATERNION POINT GROUP OF ORDER EIGHT. J. Teknol. [Internet]. 2026 Jun. 16 [cited 2026 Oct. 3];88(4):893-902. Available from: https://journals.utm.my/jurnalteknologi/article/view/25421