WATHES C M,JONES J B,KRISTENSEN H H,et al.Aversion of pigs and domestic fowl to atmospheric ammonia[J].Transactions of the AMERICAN Society of Agriculture Engineers,2002,45(5):1605-1610.
ABDELQADER A,AL-FATAFTAH A R,DAS G.Effects of dietary Bacillus subtilis and inulin supplementation on performance,eggshell quality,intestinal morphology and microflora composition of laying hens in the late phase of production[J].Animal Feed Science and Technology,2013,179(1/2/3/4):103-111.