8 Jul 2001 / 2001, in ``Dwarf Galaxies and their Environment'', 40th Graduiertenkolleg-Workshop, eds. K.S. de Boer, R.-J. Dettmar, & U. Klein (Bonn:Shaker Verlag), 41-44
11 Jul 2001 / 2001, in ``Dwarf Galaxies and their Environment'', 40th Graduiertenkolleg-Workshop, eds. K.S. de Boer, R.-J. Dettmar, & U. Klein (Bonn:Shaker Verlag), 45-52