1. Andresen, N. (1994). Fodrets energivärde vid ökande foderintag. SLU Info rapporter, Husdjur 76, SLU, Uppsala (Swedish).
2. Andresen, N. Utfodringsrekommendationer i ekologisk mjölkproduktion. Hushållningssällskapet i Kristianstad.
3. Azar, C. (2011). Biomass for energy: a dream come true… or a nightmare? Wiley Interdisciplinary Reviews: Climate Change, 2(3), 309–323.
4. Baumann, H., & Tillman, A.-M. (2004). The Hitch Hiker’s guide to LCA: An orientation in life cycle assessment methodology and application, Studentlitteratur.
5. Berg, J., & Thuen, E. (1991). A comparison between some feed energy systems based on Nordic production experiments in cattle. Norwegian Journal of Agricultural Science, 5, 7–15.