TY - JOUR AU - A. Bharucha-Reid TI - Ergodic projections for semi-groups of periodic operators JO - Studia Mathematica PY - 1958 SP - 189 VL - 17 IS - 2 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/item/STUMA_1958__17_2_216913/ LA - en ID - STUMA_1958__17_2_216913 ER -