1. Bonabeau, E., Dorigo, M., Theraultz, G.: Swarm Intelligence: From Natural to Artificial Systems. Oxford University Press, New York (1999)
2. Greco, F.: Travelling Salesman Problem. In-Teh is Croatian Branch of I-Tech Education and Publishing KG, Vienna, Austria (2008)
3. Karaboga, D., Akay, B.: A comparative study of artificial bee colony algorithm. Appl. Math. Comput 214(1), 108–132 (2009)
4. Kennedy, J., Eberhart, R.C.: Particle swarm optimization, pp. 1942–1948. Proceedings of the Fourth IEEE International Conference on Neural Networks, IEEE Service Center, Perth, Australia (1995)
5. Shah-Hosseini, H.: Optimization with the Nature-Inspired Intelligent Water Drops Algorithm. In: Sentos E.W (ed.) Evolutionary Computation, p. 572. I-Tech, Vienna, Austria (2009).