Fleet sizing and vehicle routing for container transportation in a static environment. - Pyung-Hoi Koo; Woon-Seek Lee; Dong-Won Jang (OR Spectr., 2004)

The use of bucket brigades in zone order picking systems. - Pyung-Hoi Koo (OR Spectr., 2009)

A Review on Control Strategies of Batch Processing Machines in Semiconductor Manufacturing. - Pyung-Hoi Koo; Dug Hee Moon (MIM, 2013)