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1986 Article
1987 Article
1990 Article
1991 Article
2001-11-15 Thesis
2002-03-08 Thesis
2005-11-24 Thesis
2006 Article
2008-05-26 Thesis
2008-06 DFP
2009 Article
2009-07-28 Thesis
2010-05 Article
2011 Article
2011-07 Conf. Object
2011-10 Article
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2014-12-10 Class
2015 Book