TY - JOUR AU - Burr, Stefan A. TI - Antidirected Subtrees of Directed Graphs JO - Canadian mathematical bulletin PY - 1982 SP - 119 EP - 120 VL - 25 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1982-017-4/ DO - 10.4153/CMB-1982-017-4 ID - 10_4153_CMB_1982_017_4 ER -