@inproceedings {5075,
	title = {A Logic for Rule-Based Query Optimization in Graph-Based Data Models},
	booktitle = {International Conference on Deductive and Object-Oriented Databases (DOOD)},
	year = {1993},
	doi = {10.1007/3-540-57530-8_8},
	author = {Neil Coburn and Grant Weddell}
}
