@article{VM_2005_7_1_a2,
     author = {Gwen Fisher and Blake Mellor},
     title = {On the {Topology} of {Celtic} {Knot} {Designs}},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VM_2005_7_1_a2/}
}