@article{10_4153_CMB_1970_002_4,
     author = {To, Ting-On},
     title = {On the {Hahn-Banach} {Extension} {Property}},
     journal = {Canadian mathematical bulletin},
     pages = {9--13},
     year = {1970},
     volume = {13},
     number = {1},
     doi = {10.4153/CMB-1970-002-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-002-4/}
}