The following publications are possibly variants of this publication:
- Infima of recursively enumerable truth table degreesPeter A. Fejer, Richard A. Shore. ndjfl, 29(3):420-437, 1988. [doi]
- Infima in the Recursively Enumerable Weak Truth Table DegreesRich Blaylock, Rodney G. Downey, Steffen Lempp. ndjfl, 38(3):406-418, 1997.
- A Hierarchy of computably Enumerable DegreesRod Downey, Noam Greenberg. bsl, 24(1):53-89, 2018. [doi]