@article{10_4064_fm_49_2_183_204,
     author = {A. Lelek and W. Nitka},
     title = {On convex metric spaces {I}},
     journal = {Fundamenta Mathematicae},
     pages = {183--204},
     publisher = {mathdoc},
     volume = {49},
     number = {2},
     year = {1960},
     doi = {10.4064/fm-49-2-183-204},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-49-2-183-204/}
}