Degrees Joining to 0?

David B. Posner, Robert W. Robinson. Degrees Joining to 0?. Journal of Symbolic Logic, 46(4):714-722, 1981.

Authors

David B. Posner

This author has not been identified. Look up 'David B. Posner' in Google

Robert W. Robinson

This author has not been identified. Look up 'Robert W. Robinson' in Google