MFDBS 87: 1st Symposium on Mathematical Fundamentals of Database Systems Dresden, GDR, January 19–23, 1987 Proceedings
Biskup, J ; Demetrovics, J ; Paredaens, J ; Thalheim, B Paredaens, J. ; Thalheim, B. ; Biskup, J. ; Demetrovics, J.
Berlin, Heidelberg: Springer Berlin Heidelberg 1988
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