Kertas kerja teknikal Seminar Kebangsaan Menilai Pencapaian Penyelidikan IRPA Dalam Rancangan Malaysia Kelima (Sains Sosial): Sintok, Kedah (Malaysia), 25-26 Nov, 1991
Advances in plant science: Proceedings of the 15th Malaysian Society of Plant Physiology conference: Port Dickson, Negeri Sembilan (Malaysia), 14-16 Sep, 2004, p. 306-306