7[2]Balamurali R S, Aravindan C M. Citric acid as a feed stimulant [J]. Fish Techol Soc Fish Technol India, 1997, 34(1): 9-12.
8[8]Radecki S V, Juhl M R, Miller E R. Fumaric and citric acids as feed additives in starter pig diets: effect on performance and nutrient balance[J]. J Animal Sci, 1988, 66:2 598-2 605.
9[12]Balamurali R S, Aravindan C M. Citric acid as a feed stimulant[J]. Fish Technol Soc Fish Technol India. 1997, 34(1): 9-12.
10[14]Amerio M, Cadamartiri E, Moietta A. Acidified diets in the feeding of rainbow trout: effect on some digestive indices[J]. Aquac Nutrit, 1992, 14(137):63-72.