The following publications are possibly variants of this publication:
- Increased coverage of protein families with the Blocks Database serversJorja G. Henikoff, Elizabeth A. Greene, Shmuel Pietrokovski, Steven Henikoff. nar, 28(1):228-230, 2000.
- The Blocks database--a system for protein classificationShmuel Pietrokovski, Jorja G. Henikoff, Steven Henikoff. nar, 24(1):197-200, 1996.
- Superior performance in protein homology detection with the Blocks Database serversSteven Henikoff, Shmuel Pietrokovski, Jorja G. Henikoff. nar, 26(1):309-312, 1998.