BBC One - Koko: The Gorilla Who Talks to People
Did you know there's a talking gorilla? | #TalkingGorilla | BBC - YouTube
Why can't apes talk? - Quora
Koko The Talking Gorilla - YouTube
The end of an era': Koko, the gorilla who learned sign language, dies at 46 | CBC News
Gorillas are showing signs of learning to talk, say researchers | The Independent | The Independent
How quirk of primate evolution gave humans the voice apes lack | Evolution | The Guardian
Why apes can't talk: our study suggests they've got the voice but not the brains
How do gorillas communicate? - Berggorilla & Regenwald Direkthilfe e.V.
Koko, The Gorilla Who Could 'Talk' With Sign Language, Has Died Aged 46 : ScienceAlert
Why Non-Human Primates Don't Speak Like Humans - Biology Online Archive Article
Why apes can't speak like humans - CBS News
In Search of Man: Experiments in Primate Communication,” by Francine Patterson – Michigan Quarterly Review
Koko, Kanzi, and ape language research: Criticism of working conditions and animal care.
Six Talking Apes | Science| Smithsonian Magazine
Gorillas can tell human voices apart
Talking Monkey Movies | Fandango
Collins Big Cat - Can I talk to a chimpanzee?: Band 15/Emerald
Apes may be capable of speech, new study suggests - CSMonitor.com
Gorillas can talk... and 24 other QI facts
If parrots can talk, why can't monkeys? | Science | EL PAÍS English
Why Koko the Gorilla, Who Mastered Sign Language, Mattered
KOKO - THE GORILLA WHO TALKS | Did you know there's a talking gorilla? | PBS
Koko (gorilla) - Wikipedia
