@article{Fruehwirth:1998,
        title = {Theory and Practice of Constraint Handling Rules},
        author = {Thom Fr{\"u}hwirth},
        journal = {The Journal of Logic Programming},
        number = {1-3},
        pages = {95-138},
        volume = 37,
        year = 1994,
        abstract = {Constraing Handling Rules (CHR) are our proposal to allow more flexibility and application-oriented customization of constraint systems. CHR are a declarative language extension especially designed for writing user-defined constraints...},
	biburl = {http://www.bibsonomy.org/bibtex/2f75357a26a05742bbde10319b5144c6d/diego_ma},
	keywords = {constraint_programming},
    }