Algorithms: Algorithm 336: netflow. - T. A. Bray; Christoph Witzgall (Commun. ACM, 1968)

Some complete calculi for matrices. - Rudolf Bayer; Christoph Witzgall (Commun. ACM, 1970)

Remark on algorithm 336 [H]: Netflow. - T. A. Bray; Christoph Witzgall (Commun. ACM, 1970)

Index Ranges for Matrix Calculi. - Rudolf Bayer; Christoph Witzgall (Commun. ACM, 1972)

Arc tolerances in shortest path and network flow problems. - Douglas R. Shier; Christoph Witzgall (Networks, 1980)

Algorithmic Enhancements to the Method of Centers for Linear Programming Problems. - Paul T. Boggs; Paul D. Domich; Janet R. Donaldson; Christoph Witzgall (INFORMS J. Comput., 1989)

Logarithmic SUMT limits in convex programming. - Garth P. McCormick; Christoph Witzgall (Math. Program., 2001)

On an approximate minimax circle closest to a set of points. - Saul I. Gass; Christoph Witzgall (Comput. Oper. Res., 2004)

Recovering Spheres from 3D Point Data. - Christoph Witzgall; Geraldine S. Cheok; Anthony J. Kearsley (AIPR, 2006)

Fitting Spheres to Range Data From 3-D Imaging Systems. - Marek Franaszek; Geraldine S. Cheok; Kamel S. Saidi; Christoph Witzgall (IEEE Trans. Instrum. Meas., 2009)