Hu, C-W; Hu; Liu; Zhou (2001). "The longest span stone arch bridge in the world". ARCH'01(PDF). Paris: Presses des Ponts. p. 667. ISBN9782859783471. Retrieved 2009-01-18.
"Shanxi Danhe Bridge". Arch-bridges.cn. College of Civil Engineering, Fuzhou University, China. Archived from the original on 13 February 2012. Retrieved 27 January 2017.{{cite web}}: CS1 maint: bot: original URL status unknown (link)