Proceedings of the 3rd International Conference on Plant Protection in the Tropics: volume II, Malaysian Plant Protection Society (Malaysia): Pahang (Malaysia), 20-23 Mar 1990, p. 103-107
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. 143-145