@article{10_4153_CMB_1992_057_4,
     author = {Anderson, David F. and Dobbs, David E. and Fontana, Marco},
     title = {Hilbert {Rings} {Arising} as {Pullbacks}},
     journal = {Canadian mathematical bulletin},
     pages = {431--438},
     year = {1992},
     volume = {35},
     number = {4},
     doi = {10.4153/CMB-1992-057-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1992-057-4/}
}