category e1 Full written paper- Refereed Proceedings HERDC/ERA pt.24/12/10. I can see the conference paper at: http://www5b.biglobe.ne.jp/~i5825/NIOC2009/4%20HeeSingapore.pdf --conference proceedings verified from https://repository.ugm.ac.id/135312/1/43%20NIOC%202009.pdf, but can't connect the two  - MA 31/5/16. verified from VUROPS lyn 3/6/16