Paper  doi  bibtex   

@article{flombaum_higher_2008,
	title = {Higher effect of plant species diversity on productivity in natural than artificial ecosystems},
	volume = {105},
	issn = {0027-8424, 1091-6490},
	url = {http://www.pnas.org/cgi/doi/10.1073/pnas.0704801105},
	doi = {10.1073/pnas.0704801105},
	language = {en},
	number = {16},
	urldate = {2020-10-06},
	journal = {Proceedings of the National Academy of Sciences},
	author = {Flombaum, P. and Sala, O. E.},
	month = apr,
	year = {2008},
	pages = {6087--6090}
}