BibTex format
@article{Siegert:2016:10.3389/fenvs.2016.00016,
author = {Siegert, MJ},
doi = {10.3389/fenvs.2016.00016},
journal = {Frontiers in Environmental Science},
title = {Environmental Sciences in the Twenty-First Century},
url = {http://dx.doi.org/10.3389/fenvs.2016.00016},
volume = {4},
year = {2016}
}