1. Logical depth and physical complexity, The Universal Turing Machine;Bennett;A Half-Century Survey,1988
2. Recursive computational depth;Lathrop;Information and Computation,1999
3. Computational depth: concept and applications;Antunes;Theoretical Computer Science,2006
4. Feasible depth;Doty,2007
5. Compressibility and resource bounded measure;Buhrman;SIAM Journal on Computing,2001