Fast Algorithms for Periodic Spline Wavelets on Sparse Grids. - Kai Bittner (SIAM J. Sci. Comput., 1999)

Direct and Inverse Approximation Theorems for Local Trigonometric Bases. - Kai Bittner; Karlheinz Gröchenig (J. Approx. Theory, 2002)

On interpolatory divergence-free wavelets. - Kai Bittner; Karsten Urban (Math. Comput., 2007)

Simulation of the steady state of oscillators in the time domain. - Hans Georg Brachtendorf; Kai Bittner; Rainer Laur (DATE, 2012)

Grid Size Adapted Multistep Methods for High $Q$ Oscillators. - Hans Georg Brachtendorf; Kai Bittner (IEEE Trans. Comput. Aided Des. Integr. Circuits Syst., 2013)

Initial transient response of oscillators with long settling time. - Hans Georg Brachtendorf; Kai Bittner (DATE, 2015)

Fast Algorithms for Adaptive Free Knot Spline Approximation Using Nonuniform Biorthogonal Spline Wavelets. - Kai Bittner; Hans Georg Brachtendorf (SIAM J. Sci. Comput., 2015)

Coupled circuit/EM simulation for radio frequency circuits. - Kai Bittner; Hans Georg Brachtendorf; Wim Schoenmaker; Pascal Reynier (DAC, 2017)

Simulation of THz Oscillations in Semiconductor Devices Based on Balance Equations. - Tobias Linn; Kai Bittner; Hans Georg Brachtendorf; Christoph Jungemann (J. Sci. Comput., 2020)