TY - JOUR AU - Hazrul Iswadi AU - Edy Tri Baskoro TI - On (4,2)-digraphs Containing a Cycle of Length 2 JO - Bulletin of the Malaysian Mathematical Society PY - 2000 VL - 23 IS - 1 UR - http://geodesic.mathdoc.fr/item/BMMS_2000_23_1_a8/ ID - BMMS_2000_23_1_a8 ER -