\input zb-basic
\input zb-ioport
\iteman{io-port 70865582}
\itemau{Pettie, Seth}
\itemti{An inverse-ackermann style lower bound for the online minimum spanning tree}
\itemso{FOCS, 155- (2002).}
\itemcc{}
\itemut{}
\itemli{http://doi.ieeecomputersociety.org/10.1109/SFCS.2002.1181892}
\end