Bose-Einstein condensation as a quantum phase transition in an optical lattice
M. Aizenman, É. Lieb, R. Seiringer, J. Solovej, J. Yngvason, in:, J. Asch, A. Joye (Eds.), Mathematical Physics of Quantum Mechanics, Springer, 2006, pp. 199–215.

On six problems posed by Jarik Nesetil
J. Bang Jensen, B. Reed, B. Schacht, R. Sámal, B. Toft, U. Wagner, in:, Topics in Discrete Mathematics, Springer, 2006, pp. 613–627.

Online conflict-free coloring for intervals
K. Chent, A. Fiat, H. Kaplan, M. Levy, J. Matousek, E. Mossel, J. Pach, M. Sharir, S. Smorodinsky, U. Wagner, E. Welzl, SIAM Journal on Computing 36 (2006) 1342–1359.

On a geometric generalization of the Upper Bound Theorem
U. Wagner, in:, IEEE, 2006, pp. 635–645.

K-sets in four dimensions
J. Matousek, M. Sharir, S. Smorodinsky, U. Wagner, Discrete &; Computational Geometry 35 (2006) 177–191.