There is cool interview from a Brazilian zine called S.P. Punk translated for the site KILL FROM THE HEART: http://homepages.nyu.edu/~cch223/brazil/info/olhoseco_SPinter.html
Also on Kill From The Heart you can find a discography as well. Still possible to get some Olho Seco's CDs at Brazilian shops, ebay, and some distros. This single is very rare and expensive if you find it, but these tracks here and many more are included on the split with FOGO CRUZADO and BRIGADA DE ÓDIO, worth to have it.