TY - JOUR AU - Pnueli, A. AU - Lempel, A. AU - Even, S. TI - Transitive Orientation of Graphs and Identification of Permutation Graphs JO - Canadian journal of mathematics PY - 1971 SP - 160 EP - 175 VL - 23 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-016-5/ DO - 10.4153/CJM-1971-016-5 ID - 10_4153_CJM_1971_016_5 ER -