@article{MAN_1989__284_4_164566,
     author = {W. Plesken},
     title = {Minimal dimensions for flat manifolds with prescribed holonomy.},
     journal = {Mathematische Annalen},
     pages = {477--486},
     publisher = {mathdoc},
     volume = {284},
     number = {4},
     year = {1989},
     zbl = {0648.57017},
     url = {http://geodesic.mathdoc.fr/item/MAN_1989__284_4_164566/}
}