@book{B9501,
   author = {W.~Klas AND M.~Schrefl},
   publisher = {Springer Verlag, Berlin -- Heidelberg},
   series = {Lecture Notes in Computer Science, LNCS Vol.\ 943},
   title = {{Metaclasses and their Applications: Data Model Tailoring and Database Integration}},
   year = {1995}
}
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