Philip A. Bernstein and Dah-Ming W. Chiu
Association for Computing Machinery (ACM)
Using Semi-Joins to Solve Relational Queries
Pubs/Bernstein1981# QUERYe2a740f192be955b10038aff19e6ee77
Pubs/Bernstein1981# ae3bcafc71cd6026f8fcdbe393d261d9