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 Overtone singing:

"

In Flamenco's Cante Jondo singers often include overtonal colour at the end of phrases. Perhaps originating as a way of facilitating sustain, and then becoming an appreciated ornamentation in its own right. There are many examples but Carmen Linares and Duquende often incorporate overtones.[citation needed]