|publisher=Hodges, Foster and Figgis|year=1879|pages=287–289
}}
:14.{{cite book| last = Routh| first = Edward John| authorlink = Edward Routh| title = A Treatise on Analytical Statics| url = http://books.google.com/?id=3N5JAAAAMAAJ&pg=PA315| year = 1891| publisher = University Press| chapter = Chapter X: On Strings }}Weisstein, Eric W., „Catenary“, MathWorld