Nguyen Nhut Xuan Dung, Le Thanh Quang, Le Thanh Phuong and Luu Huu Manh 20`12 Effect of crude rice bran oil, Tra fish oil and/or garlic (Allium sativum) supplementation on egg production and quality, plasma lipid, yolk cholesterol of laying hens.  Proceedings of the International Conference "Livestock-Based Farming Systems, Renewable  Resources and the Environment", 6-9 June 2012, Dalat, Vietnam (Editors: Reg Preston and Sisomphone Southavong) http:/www.mekarn.org/workshops/dalat2012/html/xuandung1.htm