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Author comment for 2003PhDT........15S:

A full text for this thesis is available at the URL http://hss.ulb.uni-bonn.de/ulb_bonn/diss_online/math_nat_fak/2003/siringo_giorgio


Author comment submitted on 10 March 2004, by Giorgio Siringo (gsiringo@mpifr-bonn.mpg.de)