Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page AD 442:

"
  • Feng, Chinese empress and regent of the Northern Wei dynasty (d. 490)[1]
  • Isidore of Miletus, Byzantine architect and mathematician (d. 537)[citation needed]
  • Placidia, Roman empress and daughter of Valentinian III (approximate date)[2]