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"On Relational Database Schemes Having Unique Minimal Key."
Joachim Biskup et al. (1991)
- Joachim Biskup, János Demetrovics, Leonid Libkin, Ilya B. Muchnik:
On Relational Database Schemes Having Unique Minimal Key. J. Inf. Process. Cybern. 27(4): 217-225 (1991)

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