Who asked the first question? : The origins of human choral singing, intelligence, language a. speech / Tbilisi Ivane Javakhishvili State Univ., Inst. of classical, byzantine a. modern greek studies, Intern. research centre of traditional polyphony. - [Tb.] : Logos, 2006. - 452 p. ; 29 cm.см.. - Bibliogr.: p. 397-437. - ISBN 99940-31-81-3[MFN: 193926]
Why do people sing? : music in human evolution / Joseph Jordania ; International Research Center for Traditional Polyphony ; The University of Melbourne ; Institute of Classical Philology, Bizantyne and Modern Greek studies. - [Tb. : Logos, 2011]. - 211 p. + [4] inset l. ill. ; 20 cm.см.. - ბიბლიოგრ.: გვ. 208-211. - ISBN 978-9941-401-86-2[MFN: 196903]