@misc{Scholl1987Towar-23397, title={Towards a minimal set of operations for nested relations}, year={1987}, author={Scholl, Marc}, note={Handout Int’l Workshop on Theory and Applications of Nested Relations and Complex Objects. Ed. by Marc H. Scholl and Hans-Jörg Schek. Position paper. Darmstadt, Apr. 1987.} }

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