Zvi Lotker Boaz Patt-Shamir Elan Pavlov David Peleg Minimum-Weight Spanning Tree Construction in <i>O</i>(log log <i>n</i>) Communication Rounds. 120-131 2005 35 SIAM J. Comput. 1 http://epubs.siam.org/SICOMP/volume-35/art_44184.html db/journals/siamcomp/siamcomp35.html#LotkerPPP05