TY - JOUR AU - Sridharan, M. R. TI - Note on an Asymptotic Formula for a Class of Digraphs JO - Canadian mathematical bulletin PY - 1978 SP - 377 EP - 381 VL - 21 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1978-068-1/ DO - 10.4153/CMB-1978-068-1 ID - 10_4153_CMB_1978_068_1 ER -