@inproceedings{bridges2018:325,
  author      = {Hart, George and Heathfield, Elisabeth},
  title       = {Catenary Arch Constructions},
  pages       = {325--332},
  booktitle   = {Proceedings of Bridges 2018: Mathematics, Art, Music, Architecture, Education, Culture},
  year        = {2018},
  editor      = {Torrence, Eve and Torrence, Bruce and S\'{e}quin, Carlo and Fenyvesi, Krist\'{o}f},
  isbn        = {978-1-938664-27-4},
  issn        = {1099-6702},
  publisher   = {Tessellations Publishing},
  address     = {Phoenix, Arizona},

  url         = {http://archive.bridgesmathart.org/2018/bridges2018-325.html}
}