Won Kim Jay Banerjee Hong-Tai Chou Jorge F. Garza Darrell Woelk Composite Object Support in an Object-Oriented Database System. 118-125 1987 conf/oopsla/1987 OOPSLA db/conf/oopsla/oopsla87.html#KimBCGW87 http://doi.acm.org/10.1145/38765.38818