@article{AM2_1973__9_136340,
     author = {WILLIAM HAMAKER},
     title = {Factoring {Groups} and {Tiling} {Space}},
     journal = {Aequationes mathematicae},
     pages = {145--149},
     publisher = {mathdoc},
     volume = {9},
     year = {1973},
     zbl = {0288.20072},
     url = {http://geodesic.mathdoc.fr/item/AM2_1973__9_136340/}
}