WAND, Yair, STOREY, Veda C., WEBER, Ron. An ontological analysis of the relationship construct in conceptual modeling. In: ACM Transactions on Database Systems. December 1999, 24(4), 494-526. doi:10.1145/331983.331989. ISSN 0362-5915 (Print). ISSN 1557-4644 (Online).
Dostupné komerčně z ACM (DOI, Licence pouze pro MFF UK): http://dx.doi.org/10.1145/331983.331989.
Dostupný komerčně také z EBSCO (Business Source Complete, Licence UK): http://web.ebscohost.com/.