Stewart M, Weidema B P (2005). A consistent framework for assessing the impacts from resource use - A focus on resource functionality. International Journal of Life Cycle Assessment 10(4):240-247 https://2-0-lca.com/?p=17856
Bare J, Brent A, Goedkoop M, Heijungs R, Itsubo N, Jolliet O, Müller-Wenk R, Peña C, Pennington D W, Potting J, Rebitzer G, Stewart M, Udo de Haes H, Weidema B P (2004). The LCIA midpoint-damage framework of the UNEP/SETAC Life Cycle Initiative. International Journal of Life Cycle Assessment 9(6):394-404 https://2-0-lca.com/?p=17869
Brent A, Goedkoop M, Itsubo N, Jolliet O, Mueller-Wenk R, Peña C, Schenk R, Stewart M, Weidema B P (2003). Final report of the LCIA definition study. Life Cycle Impact Assessment programme of The UNEP/SETAC Life Cycle Initiative https://2-0-lca.com/?p=17887