@article{VM_1999_1_1_a7,
     author = {Jay Kappraff},
     title = {Systems of {Proportion} in {Design} and {Architecture} and their   {Relationship} to {Dynamical} {Systems} {Theory}},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1999},
     url = {http://geodesic.mathdoc.fr/item/VM_1999_1_1_a7/}
}