@article{MZ_1978__160_172664,
     author = {Klaus W. Roggenkamp},
     title = {Orders of {Global} {Dimension} {Two.}},
     journal = {Mathematische Zeitschrift},
     pages = {63--68},
     publisher = {mathdoc},
     volume = {160},
     year = {1978},
     zbl = {0383.16002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__160_172664/}
}