Hakola, A., Likonen, J., Koivuranta, S., Mayer, M., Neu, R., Rohde, V., & ASDEX Upgrade Team (2009). Long-term compositions of surface layers in the all-tungsten divertor of ASDEX Upgrade. Poster presented at 12th International Workshop on Plasma-Facing Materials and Components for Fusion Applications (PFMC-12), Jülich.