Plant protection in the tropics: proceedings of the 4th International Conference on Plant Protection in the Tropics: Kuala Lumpur (Malaysia), 28-31 Mar 1994, p. 153-155
Tropical peat swamps : safe-guarding a global natural resource: proceedings of the International Conference and Workshop on Tropical Peat Swamps: Penang (Malaysia), 27-29 Jul 1999, p. 44-50