Proceedings of the Soils Science Conference of Malaysia 2009 : Soil Health : Preserving Resources for Sustainable Agriculture: Kuala Terengganu (Malaysia), 13-15 Apr 2009, p. 186-189
Proceedings of the 25th Malaysian Society of Animal Production Annual Conference: Natural Products and Nutraceuticals in Animal Production: Melaka (Malaysia), 1-3 August 2003, p. 81-82
Proceedings of the Soils Science Conference of Malaysia 2009 : Soil Health : Preserving Resources for Sustainable Agriculture: Kuala Terengganu (Malaysia), 13-15 Apr 2009, p. 290-293