1. A connected finitary co-finitary matroid is finite;Bean,1976
2. Duality in infinite graphs;Bruhn;Combin. Probab. Comput.,2006
3. H. Bruhn, R. Diestel, M. Kriesell, R. Pendavingh, P. Wollan, Axioms for infinite matroids, 2010. arXiv:1003.3919.
4. H. Bruhn, A. Georgakopoulos, Bases and closed spaces with infinite sums, Preprint, 2007. http://preprint.math.uni-hamburg.de/public/papers/hbm/hbm2006258.pdf.
5. H. Bruhn, P. Wollan, Connectivity in infinite matroids, Preprint, 2010.