Stanley P. Y. Fung Chung Keung Poon Feifeng Zheng Improved Randomized Online Scheduling of Unit Length Intervals and Jobs. 53-66 2008 WAOA http://dx.doi.org/10.1007/978-3-540-93980-1_5 conf/waoa/2008 db/conf/waoa/waoa2008.html#FungPZ08