@Article{mna-lbcus-88,
author = { Helmut Alt and Kurt Mehlhorn and Stefan N{\"a}her },
title = { A lower bound on the complexity of the union-split-find problem },
journal = { SIAM J. Comput. },
year = { 1988 },
volume = { 17 },
pages = { 1093-1102 },
}
