Kinetic theory of the electron transport in the two photon photo emission at semiconductor surfaces
N. Bucking, A. Zeiser, J. Förstner, A. Knorr, in: 2005 Quantum Electronics and Laser Science Conference, IEEE, 2005, pp. 1929–1931.

Ultrafast quantum kinetics of semiconductor intersubband transitions: polaron signatures and dephasing dynamics
S. Butscher, J. Förstner, I. Waldmuller, A. Knorr, in: 2005 Quantum Electronics and Laser Science Conference, IEEE, 2005, pp. 640–642.