Proceedings 4th Malaysian International Cocoa Conference: Sustainable Cocoa Economy Through Increase in Productivity, Efficiency and Quality: Kuala Lumpur (Malaysia), 18-19 Jul 2005, p. 176-184
Proceedings 2007 Conference on Plantation Commodities: Visionary Agriculture: Malaysian Commodity Crops in 100 Years: Kuala Lumpur (Malaysia), 3-4 Jul 2007, p. 229-238