@article{CMUC_1992__33_4_a6,
     author = {Kakol, Jerzy},
     title = {Simple construction of spaces without the {Hahn-Banach} extension property},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {623--624},
     publisher = {mathdoc},
     volume = {33},
     number = {4},
     year = {1992},
     mrnumber = {1240183},
     zbl = {0777.46003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1992__33_4_a6/}
}