"Ornithopter listing". Chudah's Corner. Archived from the original on February 4, 2008. Retrieved May 16, 2008.{{cite web}}: CS1 maint: unfit URL (link)
"Re-feel listing". Chudah's Corner. Archived from the original on October 27, 2006. Retrieved January 5, 2007.{{cite web}}: CS1 maint: unfit URL (link)