@article{shigetomi2015trends,
  title = {Trends in Japanese households' critical-metals material footprints}
  author = {Shigetomi, Yosuke; Nansai, Keisuke; Kagawa, Shigemi; Tohno, Susumu},
  journal = {Ecological Economics},
  url = {http://www.sciencedirect.com/science/article/pii/S0921800915003468},
  doi = {10.1016/j.ecolecon.2015.08.010},
  year = {2015}
}