Hanssen, O. J. (1997). Sustainable industrial product systems: Integration of life cycle assessment in product development and optimisation of product systems. Stiftelsen Østfoldforskning.
Lua i Stíl Chicago (17ú heag.)Hanssen, Ole Jørgen. Sustainable Industrial Product Systems: Integration of Life Cycle Assessment in Product Development and Optimisation of Product Systems. Fredrikstad ; Trondheim: Stiftelsen Østfoldforskning, 1997.
Lua MLA (8ú heag.)Hanssen, Ole Jørgen. Sustainable Industrial Product Systems: Integration of Life Cycle Assessment in Product Development and Optimisation of Product Systems. Stiftelsen Østfoldforskning, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.