@article{10_4064_fm_106_3_227_230,
     author = {Joseph Valentine},
     title = {Banach-Euclidean four-point properties},
     journal = {Fundamenta Mathematicae},
     pages = {227--230},
     publisher = {mathdoc},
     volume = {106},
     number = {3},
     year = {1980},
     doi = {10.4064/fm-106-3-227-230},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-106-3-227-230/}
}