New dimensions and challenges for sustainable livestock farming: proceedings of the 11th Animal Science Congress: Kuala Lumpur (Malaysia), 5-9 Sept 2014, p. 539-541
Proceedings of the Soils Science Conference of Malaysia 2008 : Sustaining Soil Ecosystems with Emphasis on Coastal Soils: Perak (Malaysia), 15-17 April 2008, p. 79-82