@inproceedings{mrpods89,
author = {Heikki Mannila and K.-J. R{\"a}ih{\"a}},
booktitle = {Proceedings of the Eigth ACM SIGACT-SIGMOD-SIGART Symposium on Database and Knowledgebase Systems},
pages = {128-133},
title = {Practical algorithms for finding prime attributes and testing normal forms},
year = {1989},
}