TY - JOUR AU - GROSSE-ERDMANN, KARL-G. TI - FREQUENTLY HYPERCYCLIC BILATERAL SHIFTS JO - Glasgow mathematical journal PY - 2019 SP - 271 EP - 286 VL - 61 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089518000204/ DO - 10.1017/S0017089518000204 ID - 10_1017_S0017089518000204 ER -