1. An O(n log n) sorting network;Ajtai;Proc. 15th ACM Symp. on Theory of Computing,1983
2. Sorting networks and their applications;Batcher;AFIPS Spring Joint Computer Conf.,1968
3. Techniques for the analysis of monotone Boolean networks;Dunne,1984
4. A 2.5n lower bound on the monotone network complexity of Tn3;Dunne;Acta Inform.,1985