Computing the Convex Hull in the Euclidean Plane in Linear Expected Time. - Karl Heinz Borgwardt; Norbert Gaffke; Michael Jünger; Gerhard Reinelt (Applied Geometry And Discrete Mathematics, 1990)

Book reviews. - M. Bischoff; Norbert Gaffke; K. Fleischmann; Gerhard Reinelt (ZOR Methods Model. Oper. Res., 1993)

30 Approximate designs for polynomial regression: Invariance, admissibility, and optimality. - Norbert Gaffke; Berthold Heiligers (Design and analysis of experiments, 1996)

A class of extremum problems related to agency models with imperfect monitoring. - Jörg Budde; Norbert Gaffke (Math. Methods Oper. Res., 1999)

Vector and matrix apportionment problems and separable convex integer optimization. - Norbert Gaffke; Friedrich Pukelsheim (Math. Methods Oper. Res., 2008)

Divisor methods for proportional representation systems: An optimization approach to vector and matrix apportionment problems. - Norbert Gaffke; Friedrich Pukelsheim (Math. Soc. Sci., 2008)

Convergence of the conditional per symbol entropy for stationary Gaussian fading channels for almost all input sequences. - Meik Dorpinghaus; Norbert Gaffke; Lorens A. Imhof; Rudolf Mathar (ITA, 2013)

Algorithms for approximate linear regression design with application to a first order model with heteroscedasticity. - Norbert Gaffke; Ulrike Graßhoff; Rainer Schwabe (Comput. Stat. Data Anal., 2014)

Optimal design for multivariate observations in seemingly unrelated linear models. - Moudar Soumaya; Norbert Gaffke; Rainer Schwabe (J. Multivar. Anal., 2015)

A Log-Det Inequality for Random Matrices. - Meik Dörpinghaus; Norbert Gaffke; Lorens A. Imhof; Rudolf Mathar (SIAM J. Matrix Anal. Appl., 2015)