Feifeng Zheng E. Zhang Yinfeng Xu Xiaoping Wu An Optimal Strategy for Online Non-uniform Length Order Scheduling. 328-336 2008 AAIM http://dx.doi.org/10.1007/978-3-540-68880-8_31 conf/aaim/2008 db/conf/aaim/aaim2008.html#ZhengZXW08