Valentina S. Harizanov The Possible Turing Degree of the Nonzero Member in a Two Element Degree Spectrum. [Citation Graph (0, 0)][DBLP] Ann. Pure Appl. Logic, 1993, v:60, n:1, pp:1-30 [Journal]

Thomas A. Nevins Degrees of Convex Dependence in Recursively Enumerable Vector Spaces. [Citation Graph (0, 0)][DBLP] Ann. Pure Appl. Logic, 1993, v:60, n:1, pp:31-47 [Journal]