@article{SF_1974__7_134013,
     author = {Frank Raymond and P.E. Conner},
     title = {A quadratic form on the quotient of a periodic map.},
     journal = {Semigroup forum},
     pages = {310--333},
     publisher = {mathdoc},
     volume = {7},
     year = {1974},
     zbl = {0283.57016},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__7_134013/}
}