A Heuristic for the Stacker Crane Problem on Trees Which Is Almost Surely Exact.

Amin Coja-Oghlan Sven Oliver Krumke Till Nierhoff A Heuristic for the Stacker Crane Problem on Trees Which Is Almost Surely Exact. 605-614 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2906&spage=605 2003 conf/isaac/2003 ISAAC db/conf/isaac/isaac2003.html#Coja-OghlanKN03