Approximation Algorithms for Scheduling Parallel Jobs: Breaking the Approximation Ratio of 2. - Klaus Jansen; Ralf Thöle (ICALP (1), 2008)

Approximation Algorithms for 3D Orthogonal Knapsack. - Florian Diedrich; Rolf Harren; Klaus Jansen; Ralf Thöle; Henning Thomas (J. Comput. Sci. Technol., 2008)

Approximation algorithms for packing and scheduling problems (Approximationsalgorithmen für Packungs- und Scheduling-Probleme) - Ralf Thöle (2008)

Approximation Algorithms for Scheduling Parallel Jobs. - Klaus Jansen; Ralf Thöle (SIAM J. Comput., 2010)