@article{IM_1973__20_142217,
     author = {Jacob Eli Goodman and Alan Landman},
     title = {Varieties {Proper} over {Affine} {Schemes.}},
     journal = {Inventiones mathematicae},
     pages = {267--312},
     publisher = {mathdoc},
     volume = {20},
     year = {1973},
     zbl = {0304.14002},
     url = {http://geodesic.mathdoc.fr/item/IM_1973__20_142217/}
}