W. Bruce Croft Lisa Ann Smith Howard R. Turtle A Loosely-Coupled Integration of a Text Retrieval System and an Object-Oriented Database System. 223-232 1992 SIGIR db/conf/sigir/sigir92.html#CroftST92 conf/sigir/92 SIGIR1992/P223.pdf db/conf/sigir/CroftST92.html