@article{10_4153_CMB_1990_054_1,
     author = {Lucas, Thomas G.},
     title = {Valuation {Rings} and {Integral} {Closure}},
     journal = {Canadian mathematical bulletin},
     pages = {327--330},
     year = {1990},
     volume = {33},
     number = {3},
     doi = {10.4153/CMB-1990-054-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1990-054-1/}
}