Proceedings of the Seminar on Medicinal and Aromatic Plants: Towards Modernisation of Research and Technology in Herbal Industries: Kuala Lumpur (Malaysia), 24-25 Jul 2002, p. 190-195
Proceedings of the Malaysian Society of Soil Science Conference 2002 : Applications of Modern Tools in Agriculture: Perlis (Malaysia), 23-24 Apr 2002, p. 186-189
Proceedings of the Seminar on Medicinal and Aromatic Plants: Towards Modernisation of Research and Technology in Herbal Industries: Kuala Lumpur (Malaysia), 24-25 Jul 2002, p. 269-272