Volume 2009 [2 articles]

• ZPC matrices and zero cycles, Marina Arav, Frank Hall, Zhongshan Li, Bhaskara Rao
  Volume 2009 (2009), Article ID 520923, 5 pages
• Single-machine scheduling problems with a sum-of-processing-time-based learning function, Xingong Zhang, Guangle Yan
  Volume 2009 (2009), Article ID 624108, 8 pages