Improved Hierarchical Bit-Vector Compression in Document Retrieval Systems. - Yaacov Choueka; Aviezri S. Fraenkel; Shmuel T. Klein; E. Segal (SIGIR, 1986)

Improved Techniques for Processing Queries in Full-Text Systems. - Yaacov Choueka; Aviezri S. Fraenkel; Shmuel T. Klein; E. Segal (SIGIR, 1987)