Linear connectivity forces large complete bipartite minors: An alternative approach. - Jan-Oliver Fröhlich; Theodor Müller (J. Comb. Theory B, 2011)

On the excluded minor structure theorem for graphs of large tree-width. - Reinhard Diestel; Ken-ichi Kawarabayashi; Theodor Müller; Paul Wollan (J. Comb. Theory B, 2012)