Brown, Steven. “Joseph Jordania. Who Asked the First Question? The Origin of Human Choral Singing, Intelligence, Language and Speech. Tbilisi: Logos, 2006, 450 Pp”. Kadmos. A Journal of the Humanities, no. 1 (December 20, 2009): 325–330. Accessed September 25, 2026. https://kadmos.iliauni.edu.ge/index.php/kadmos/article/view/549.