Neumann, Frank Algorithms and Complexity, MPI for Informatics, Max Planck Society;
Helwig, S., Neumann, F., & Wanka, R. (2009). Particle Swarm Optimization with Velocity Adaptation. In International Conference on Adaptive and Intelligent Systems 2009 (pp. 146-151). PIscataway, NJ: IEEE. doi:10.1109/ICAIS.2009.32.