Donald E. Swartwout, J. C. Lagarias. On the Requirements of Navigational Relationship Representations. In Y. Edmund Lien, editor, Proceedings of the 1981 ACM SIGMOD International Conference on Management of Data, Ann Arbor, Michigan, April 29 - May 1, 1981. pages 1-9, ACM Press, 1981. [doi]
Abstract is missing.