TY - JOUR AU - Shao, Yanling AU - Gao, Yubin TI - Exponents of two-colored digraphs JO - Czechoslovak Mathematical Journal PY - 2009 SP - 655 EP - 685 VL - 59 IS - 3 UR - http://geodesic.mathdoc.fr/item/CMJ_2009_59_3_a8/ LA - en ID - CMJ_2009_59_3_a8 ER -