Recent papers

• Forcing finite minors in sparse infinite graphs by large-degree assumptions, preprint 2012; PDF
  
• A simple existence criterion for normal spanning trees in infinite graphs, preprint 2012; PDF.
  
• The structure of 2-separations of infinite matroids (with E. Aigner-Horev & L. Postle), preprint 2012; PDF
  
• Dual trees must share their ends (with J. Pott), preprint 2011; PDF
  
• Connectivity and tree-structure in finite graphs (with J. Carmesin, F. Hundertmark & M. Stein), preprint 2011; PDF.
• Infinite matroids in graphs (with H. Bruhn), in the Infinite Graph Theory special volume of Discrete Math 311 (2011), 1461-1471; PDF
• Axioms for infinite matroids (with H. Bruhn, M. Kriesell, R. Pendavingh & P. Wollan), to appear in Advances of Mathematics; PDF
• The Erdös-Pósa property for clique minors in highly connected graphs (with K. Kawarabayashi & P. Wollan), J. Combin. Theory (Series B) 102 (2012), 454-469; PDF.
  
• On the homology of locally compact spaces with ends (with P. Sprüssel), Topology and its Applications 158 (2011), 1626-1639; PDF.
  
• On the excluded minor structure theorem for graphs of large tree-width (with K. Kawarabayashi, T. Müller & P. Wollan), J. Combin. Theory (Series B) 102 (2012), 1189-1210; PDF.
  
• Twins of rayless graphs (with A. Bonato, H. Bruhn & P. Sprüssel), JCTB 101 (2011) 60-65; PDF.
  
• Locally finite graphs with ends: a topological approach I–III (survey), Discrete Math 311–312 (2010–11); PDF
• The fundamental group of a locally finite graph with ends (with P. Sprüssel), Advances in Mathematics 226 (2011), 2643-2675; abstract; PDF.
• Every rayless graph has an unfriendly partition (with H. Bruhn, A. Georgakopoulos & P. Sprüssel), Combinatorica 30 (2010), 521-532; DVI, PDF.
• The homology of locally finite graphs with ends (with P. Sprüssel), Combinatorica 30 (2010), 681-714; abstract; journal version; extended version.
• MacLane's theorem for arbitrary surfaces (with H. Bruhn), J. Combin. Theory (Series B) 99 (2009) 275-286; abstract; short; extended