TY - JOUR AU - Ton, Bui An TI - Periodic Solutions of Non-Linear Evolution Equations in Banach Spaces JO - Canadian journal of mathematics PY - 1971 SP - 189 EP - 196 VL - 23 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-018-x/ DO - 10.4153/CJM-1971-018-x ID - 10_4153_CJM_1971_018_x ER -