@article{MAN_1987__278_164289,
     author = {Nicolaas H. Kuiper},
     title = {A {New} {Knot} {Invariant.}},
     journal = {Mathematische Annalen},
     pages = {193--210},
     publisher = {mathdoc},
     volume = {278},
     year = {1987},
     zbl = {0632.57006},
     url = {http://geodesic.mathdoc.fr/item/MAN_1987__278_164289/}
}