@article {curran2014critical,
	title = {Critical review: a summary of the current state-of-practice},
	journal = {The International Journal of Life Cycle Assessment},
	volume = {19},
	number = {10},
	year = {2014},
	pages = {1667{\textendash}1673},
	publisher = {Springer Berlin Heidelberg},
	author = {Curran, Mary Ann and Young, Steven B}
}