Keeling, Richard. <br/><br/>
Animal impersonation songs as an anciet musical system in north ámerica, northeast µsia, and Artic Europe. 

 - Bloomington-US :   Society for ethnomusicology,   2012. 
 - páginas 234-265 :   Ilustraciones blanco y negro 
 - Irregular 
 - Vol.56, no.2 (2012) 
 - Ethnomusicology.Journal of the society for ethnomusicology ;   no.2 .
 - Society for ethnomusicology. .