Media type: E-Article Title: Class hierarchy specialization Contributor: Tip, Frank; Sweeney, Peter F. Published: Springer Science and Business Media LLC, 2000 Published in: Acta Informatica, 36 (2000) 12, Seite 927-982 Language: English DOI: 10.1007/pl00013298 ISSN: 0001-5903 Origination: Footnote: