@article{10_4064_fm_99_3_205_211,
     author = {Thomas Moore},
     title = {On {Fox's} theory of overlays},
     journal = {Fundamenta Mathematicae},
     pages = {205--211},
     publisher = {mathdoc},
     volume = {99},
     number = {3},
     year = {1978},
     doi = {10.4064/fm-99-3-205-211},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-99-3-205-211/}
}