Sanders, Peter Algorithms and Complexity, MPI for Informatics, Max Planck Society;
Pettie, Seth Algorithms and Complexity, MPI for Informatics, Max Planck Society;
Sanders, P., & Pettie, S.(2004). A simpler linear time 2/3-epsilon approximation (MPI-I-2004-1-002). Saarbrücken: Max-Planck-Institut für Informatik.