@article{CMUC_2013__54_2_a9,
     author = {Hirata, Yasushi and Yajima, Yukinobu},
     title = {The sup = max problem for the extent  of generalized metric spaces},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {245--257},
     publisher = {mathdoc},
     volume = {54},
     number = {2},
     year = {2013},
     mrnumber = {3067707},
     zbl = {06221266},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2013__54_2_a9/}
}