1. cKanren: miniKanren with Constraints;Alvis;Scheme Workshop 11,2011
2. Declaring Numbers;Braßel;Electronic Notes in Theoretical Computer Science,2008
3. αKanren: A Fresh Name in Nominal Logic Programming;Byrd,2007
4. miniKanren, live and untagged;Byrd,2012
5. Negation as Failure;Clark,1978