TY - JOUR AU - Fan Chung TI - A generalized Alon-Boppana bound and weak Ramanujan graphs JO - The electronic journal of combinatorics PY - 2016 VL - 23 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.37236/5933/ DO - 10.37236/5933 ID - 10_37236_5933 ER -