@article{VM_2004_6_4_a3,
     author = {Skip Pennock},
     title = {Of {Torus} and {Turk's-Head} {Knots:} {A} {Polar} {Trigonometric} {Modeling}},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {2004},
     url = {http://geodesic.mathdoc.fr/item/VM_2004_6_4_a3/}
}