TY - JOUR AU - Robby Robby AU - Jonathan Hoseana TI - Mixing problems represented by quasi-digraphs JO - The Teaching of Mathematics PY - 2024 SP - 79 VL - XXVII IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.57016/TM-NXML6989/ DO - 10.57016/TM-NXML6989 LA - en ID - 10_57016_TM_NXML6989 ER -