@article{MZ_1980__171_172931,
     author = {Richard Hartley},
     title = {Knots and {Involutions.}},
     journal = {Mathematische Zeitschrift},
     pages = {175--186},
     publisher = {mathdoc},
     volume = {171},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MZ_1980__171_172931/}
}