deb http://debian.pop-sc.rnp.br/debian/ squeeze main
deb-src http://debian.pop-sc.rnp.br/debian/ squeeze main

deb http://security.debian.org/ squeeze/updates main
deb-src http://security.debian.org/ squeeze/updates main

# squeeze-updates, previously known as 'volatile'
deb http://debian.pop-sc.rnp.br/debian/ squeeze-updates main
deb-src http://debian.pop-sc.rnp.br/debian/ squeeze-updates main