@article{PORMA_1955__14_1_114747,
     author = {Weston, J.D.},
     title = {Hypermetric groups},
     journal = {Portugaliae mathematica},
     pages = {21--25},
     publisher = {mathdoc},
     volume = {14},
     number = {1},
     year = {1955},
     mrnumber = {0073924},
     zbl = {0065.26401},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1955__14_1_114747/}
}