@article{ringler2013the,
  title = {The nexus across water, energy, land and food (WELF): potential for improved resource use efficiency?}
  author = {Ringler, Claudia; Bhaduri, Anik; Lawford, Richard},
  journal = {Current Opinion in Environmental Sustainability},
  url = {http://www.sciencedirect.com/science/article/pii/S1877343513001504},
  doi = {10.1016/j.cosust.2013.11.002},
  year = {2013}
}