1. Azapagic, A.;Clift, R. (1998): Linear Programming as a Tool in Life Cycle Assessment. International Journal of Life Cycle Assessment, 3 (6), 305–316
2. Frischknecht, R. (1998): Life Cycle Inventory Analysis for Decision-Making. Ph.D. thesis, Swiss Federal Institute of Technology, Switzerland
3. Ekvall, T. (1999): System Expansion and Allocation in Life Cycle Assessment with Implications for Wastepaper Management. Ph.D. thesis, Chalmers University of Technology, Sweden
4. Huppes, G. (1994): A General Method for Allocation in LCA. Proceedings of Allocation in LCA. SETAC-Europe, p.74
5. ISO 14041 (1998): Environmental Management — Life Cycle Assessment — Goal and Scope Definition and Inventory Analysis