The following publications are possibly variants of this publication:
- Counting Classes: Thresholds, Parity, Mods, and FewnessRichard Beigel, John Gill, Ulrich Hertrampf. STACS 1990: 49-57
- Counting Classes: Thresholds, Parity, Mods, and FewnessRichard Beigel, John Gill. TCS, 103(1):3-23, 1992.