  F.C. Gomes, P. Pardalos, C.S. Oliveira, and M.G.C. Resende. Reactive GRASP with path relinking for channel assignment in mobile phone networks. In Proceedings of the 0th International Workshop on Discrete Algorithms and Methods for Mobile Computing and Communications, pages 00-00, Rome, 0000. ACM Press.  G. Grahne and J. Zhu. Efficiently using prefix-trees in mining frequent itemsets, 0000. URL http://​bit.​ly/​0qxiKbl