@article{VM_2006_8_2_a2,
     author = {John Rigby and Brian Wichmann},
     title = {Some {Patterns} {Using} {Specific} {Tiles}},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {2006},
     url = {http://geodesic.mathdoc.fr/item/VM_2006_8_2_a2/}
}