@article{10_4153_CJM_1971_018_x,
     author = {Ton, Bui An},
     title = {Periodic {Solutions} of {Non-Linear} {Evolution} {Equations} in {Banach} {Spaces}},
     journal = {Canadian journal of mathematics},
     pages = {189--196},
     year = {1971},
     volume = {23},
     number = {1},
     doi = {10.4153/CJM-1971-018-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-018-x/}
}