7JONDREVILLE C, REVY P S, DOURMAD J Y. Dietary means to better control the environmental impact of copper and zincb pigs from weaning to slaughter[J]. Livestock Production Science, 2003, 84: 147-156.
8JONDREVILLE C, REVY-P S. An update on use of organic minerals in swine nutrition[J]. In: Proceedings of Eastern Nutrition Conference, Quebec, Canada, 2003: 1-16.
9VOOBURG J H. Farmers Options to reduce odour and ammonia emissions from animal buildings and storage[J]. In: Proceedings of 7th technical consultation of the European cooperative research network on animal waste utilization, Germany, Bad Zwischenahn. 1994, 5: 17-20.
