@article{CMH_1973__48_139564,
     author = {David Frank},
     title = {The {Signature} mod 8},
     journal = {Commentarii mathematici Helvetici},
     pages = {520--524},
     publisher = {mathdoc},
     volume = {48},
     year = {1973},
     zbl = {0284.55024},
     url = {http://geodesic.mathdoc.fr/item/CMH_1973__48_139564/}
}