TY - JOUR AU - Pradthana Jaipong AU - Wanchai Tapanyo TI - Generalized classes of suborbital graphs for the congruence subgroups of the modular group JO - Algebra and discrete mathematics PY - 2019 SP - 20 EP - 36 VL - 27 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ADM_2019_27_1_a3/ LA - en ID - ADM_2019_27_1_a3 ER -