The following publications are possibly variants of this publication:
- The Set Union Problem with Dynamic Weighted BacktrackingGiorgio Gambosi, Giuseppe F. Italiano, Maurizio Talamo. bit, 31(3):383-393, 1991.
- Worst-Case Analysis of the Set-Union Problem with Extended BacktrackingGiorgio Gambosi, Giuseppe F. Italiano, Maurizio Talamo. TCS, 68(1):57-70, 1989.
- A partially persistent data structure for the set-union problemCarlo Gaibisso, Giorgio Gambosi, Maurizio Talamo. ita, 24:189-204, 1990.