Its resolution in 1979 unlocked the bilateral nuclear cooperation that would unfold .
Later that decade , when Brazil sought to push for some degree of bilateral nuclear cooperation , it was Argentina that balked , insisting the river dispute be addressed first .
Brazil 's resolution in 1979 unlocked the bilateral nuclear cooperation that would unfold .
Later that decade , when Brazil sought to push for some degree of bilateral nuclear cooperation , it was Argentina that balked , insisting the river dispute be addressed first .