Mihai Patrascu, Mikkel Thorup. Don t rush into a union: take time to find your roots. In Lance Fortnow, Salil P. Vadhan, editors, Proceedings of the 43rd ACM Symposium on Theory of Computing, STOC 2011, San Jose, CA, USA, 6-8 June 2011. pages 559-568, ACM, 2011. [doi]
Abstract is missing.