@chapter{CalbrixKnapik,
    Author = {Calbrix, Hugues and Knapik, Teodor},
    BookTitle = {Foundations of Software Technology and Theoretical Computer Science},
    File = {A String-Rewriting Characterization of Muller and Schupp's Context-Free Graphs - Calbrix, Knapik (0) (0) - a - a - v.pdf},
    Pages = {1056--1057},
    Series = {Lecture Notes in Computer Science},
    Title = {A String-Rewriting Characterization of Muller and Schupp's Context-Free Graphs},
    Volume = {1530},
    Year = {1998},
    bdsk-url-1 = {http://www.springerlink.com/content/yfujn1w2re6t4cfq/fulltext.pdf},
    bdsk-url-2 = {http://dx.doi.org/10.1007/978-3-540-49382-2\_31},
    date-added = {2012-05-18 12:43:00 +0200},
    date-modified = {2012-05-18 10:43:00 +0000},
    doi = {10.1007/978-3-540-49382-2_31}
}

@chapter{CalbrixKnapik, Author = {Calbrix, Hugues and Knapik, Teodor}, BookTitle = {Foundations of Software Technology and Theoretical Computer Science}, File = {A String-Rewriting Characterization of Muller and Schupp's Context-Free Graphs - Calbrix, Knapik (0) (0) - a - a - v.pdf}, Pages = {1056--1057}, Series = {Lecture Notes in Computer Science}, Title = {A String-Rewriting Characterization of Muller and Schupp's Context-Free Graphs}, Volume = {1530}, Year = {1998}, bdsk-url-1 = {http://www.springerlink.com/content/yfujn1w2re6t4cfq/fulltext.pdf}, bdsk-url-2 = {http://dx.doi.org/10.1007/978-3-540-49382-2_31}, date-added = {2012-05-18 12:43:00 +0200}, date-modified = {2012-05-18 10:43:00 +0000}, doi = {10.1007/978-3-540-49382-2_31} }