Author comment for 2003PhDT.........4G:
This thesis is available from the author's home institution at the URL:
https://www.astro.iag.usp.br/~dimitri/phdthesis/phdthesis.html
Author comment submitted on 29 January, 2004 by Dimitri Alexei Gadotti
(dimitri@astro.iag.usp.br)