The potential Neandertal vowel space was as large as that of modern humans. - Louis-Jean Boë; Jean-Louis Heim; Kiyoshi Honda; Shinji Maeda (J. Phonetics, 2002)

The vocal tract of newborn humans and Neanderthals: Acoustic capabilities and consequences for the debate on the origin of language. A reply to Lieberman (2007a). - Louis-Jean Boë; Jean-Louis Heim; Kiyoshi Honda; Shinji Maeda; Pierre Badin; Christian Abry (J. Phonetics, 2007)