@article{DOCMA_1999__4__a3,
     author = {Rieffel, Marc A.},
     title = {Metrics on state spaces},
     journal = {Documenta mathematica},
     pages = {559--600},
     publisher = {mathdoc},
     volume = {4},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_1999__4__a3/}
}