Too easy:
Gross, Robert L (1990). 'Heavy Metal Music: A New Subculture in American Society.'
Journal of Popular Culture; Summer 1990; 24, 1; Academic Research Library
pg. 119-130
Breen, M. (2006??) 'A stairway to heaven or a highway to hell?:
Heavy metal rock music in the 1990s', Cultural Studies, 5:2, 191 - 203
To link to this article: DOI: 10.1080/09502389100490161
URL:
http://dx.doi.org/10.1080/09502389100490161And my personal favorite:
Avelar, I. (2003). 'Heavy Metal Music in Postdictatorial Brazil: Sepultura
and the Coding of Nationality in Sound' Journal of Latin American Cultural Studies,
Vol. 12, No. 3, 329-346.
He shouldn't have any trouble accessing these articles if he's associated with a particular institution. I think the Sepultura one would be very relevant if he's looking for local effects, as Brazil is relatively close to Colombia. . . Should be able to fine some other decent articles in the bibliographies as well.
~The (Studious) Cretin~