published by the acclaimed photographer vincent rosenblatt, this website shows hundreds of great pictures of a variety of bailes funk throughout brazil, including in rio de janeiro. 

memórias do olhar: as favelas do rio de janeiro na lembrança dos repórteres fotográficos (memories of the gaze: the favelas of rio de janeiro in the memory of photojournalists) by mauro amoroso, is a particularly interesting paper analyzing materials collected in the 60's and 70's pertaining to favelas in that period.  the paper also examines the role of the media in the process. this paper can be read in its entirety here.