@article{PORMA_1993__50_2_115818,
     author = {Chen, Chengxiang},
     title = {The {Brauer} ring of a commutative ring},
     journal = {Portugaliae mathematica},
     pages = {163--170},
     publisher = {mathdoc},
     volume = {50},
     number = {2},
     year = {1993},
     mrnumber = {1244496},
     zbl = {0796.13001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1993__50_2_115818/}
}