@article{
    khardon,
    author = "Khardon, R. and Mannila, Heikki and Roth, D.",
    title = "Reasoning with examples: propositional formulae and database dependencies",
    journal = "Acta Informatica",
    number = "4",
    volume = "36",
    year = "1999",
    pages = "267-286"
}