@article{kalmykova2018circular,
  title = {Circular economy – From review of theories and practices to development of implementation tools}
  author = {Kalmykova, Yuliya; Sadagopan, Madumita; Rosado, Leonardo},
  journal = {Resources, Conservation and Recycling},
  url = {http://www.sciencedirect.com/science/article/pii/S0921344917303701},
  doi = {10.1016/j.resconrec.2017.10.034},
  year = {2018}
}