On the Single-Operation Worst-Case Time Complexity on the Disjoint Set Union Problem.

Norbert Blum On the Single-Operation Worst-Case Time Complexity on the Disjoint Set Union Problem. 32-38 1985 conf/stacs/1985 STACS db/conf/stacs/stacs85.html#Blum85 http://dx.doi.org/10.1007/BFb0023992