| 2010 | ATMOS | Dynamic Graph Generation and Dynamic Rolling Horizon Techniques in Large Scale Train Timetabling. | Frank Fischer, Christoph Helmberg |
| 2008 | ATMOS | Towards Solving Very Large Scale Train Timetabling Problems by Lagrangian Relaxation. | Frank Fischer, Christoph Helmberg, Jrgen Janen, Boris Krostitz |
| 2008 | IPCO | A Comparative Study of Linear and Semidefinite Branch-and-Cut Methods for Solving the Minimum Graph Bisection Problem. | Michael Armbruster, Marzena Fgenschuh, Christoph Helmberg, Alexander Martin |
| 1999 | IPCO | The m-Cost ATSP. | Christoph Helmberg |
| 1998 | IPCO | Incorporating Inequality Constraints in the Spectral Bundle Method. | Christoph Helmberg, Krzysztof C. Kiwiel, Franz Rendl |
| 1997 | ESA | Fixing Variables in Semidefinite Relaxations. | Christoph Helmberg |
| 1996 | IPCO | Quadratic Knapsack Relaxations Using Cutting Planes. | Christoph Helmberg, Franz Rendl, Robert Weismantel |
| 1995 | IPCO | Combining Semidefinite and Polyhedral Relaxations for Integer Programs. | Christoph Helmberg, Svatopluk Poljak, Franz Rendl, Henry Wolkowicz |
| 1993 | IPCO | A spectral approach to bandwidth and separator problems in graphs. | Christoph Helmberg, Bojan Mohar, Svatopluk Poljak, Franz Rendl |