1. AGRICULTURAL RESEARCH COUNCIL (1980). The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux; Farnham Royal, Slough
2. AGRICULTURAL RESEARCH COUNCIL (1984). The Nutrient Requirements of Ruminant Livestock. Supplement 1. Commonwealth Agricultural Bureaux; Farnham Royal, Slough
3. BARBER, W.P. (1984). Proceedings of the 7th Silage Conference, pp. 87–88. Ed. F.J. Gordon and E.F. Unsworth. Queens University; Belfast
4. Effect of treatment with formaldehyde, formic acid, and formaldehyde—acid mixtures on the chemical composition and nutritive value of silage
5. The influence of formic acid and formaldehyde additives and type of harvesting machine on the utilization of nitrogen in lucerne silages: 1. The voluntary intake and nitrogen rerention of young sheep consuming the silages with and without intraperitoneal supplements of DL-methionine