Papers:

Motivic cohomology and motives:

• Descent properties of equivariant K-theory
  [arXiv:1002.2565v1 [math.KT]]
• On a spectal sequence for equivariant K-theory (with Marc Levine)
  K-Theory 38 (2008), no. 2, 177--222.
  [arXiv:math/0511394v3 [math.KT]]
• A triangulated category of equivariant motives
  [SFB-Preprint]
• Resolution of unbounded complexes in Grothendieck categories
  Journal of Pure and Applied Algebra 177 (2003), no. 1, 103--112.
  [SFB-Preprint]
• Eine triangulierte Kategorie äquivarianter Motive
  Doktorarbeit
  [SFB-Preprint]

Nonstandard methods in algebraic geometry:

• Uniform bounds and ultraproducts of cycles (with Lars Brünjes)
  [arXiv:0901.4853 [math.AG]]
• Etale and motivic cohomology and ultraproducts of schemes (with Lars Brünjes)
  [arXiv:0807.1007 [math.AG]]
• Nonstandard model categories and homotopy theory (with Lars Brünjes)
  [arXiv:0807.1002 [math.AG]]
• Enlargements of schemes (with Lars Brünjes)
  Logic and Analysis 1 (2007), no. 1, 1--60.
  [pdf] (The copyright owner is Springer-Verlag/Wien and you can find the paper also at www.springerlink.com)
• Nonstandard Étale Cohomology (with Lars Brünjes)
  Accepted for publication in Journal of Pure and Applied Algebra
  [arXiv:math/0412406]
• Enlargements of Categories (with Lars Brünjes)
  Theory Appl. Categ. 14 (2005), No. 16, 357--398
  [TAC]

Miscellaneous:

• Nonstandard Methods in Algebraic Geometry
  Slides of a lecture [pdf]
• A spectral sequence for equivariant K-theory
  Summery of a talk (Oberwolfach reports) [pdf]
• Cobordism and Chow groups
  Summery of a talk (Oberwolfach reports) [pdf]
• Zur zweiten Stufe der Zagier Vermutung für elliptische Kurven
  Diplomarbeit