"musom.marshall.edu". Archived from the original on 2009-02-27. Retrieved 2009-05-28. https://web.archive.org/web/20090227080017/http://musom.marshall.edu/anatomy/grosshom/z_devbranc.html ↩
"Archived copy". Archived from the original on 2008-12-17. Retrieved 2008-02-14.{{cite web}}: CS1 maint: archived copy as title (link) https://web.archive.org/web/20081217114417/http://isc.temple.edu/marino/embryology/parch98/ARCHI97/Img016.gif ↩