@misc{arora2019singapore,
  title = {Singapore - Stock & Inflow Data of Concrete & Steel}
  author = {Arora, M., Raspall, F., Cheah, L., & Silva, A. (2019). Residential building material stocks and component-level circularity: The case of Singapore. Journal of Cleaner Production, 216, 239–248. https://doi.org/10.1016/j.jclepro.2019.01.199},
  url = {https://www.sciencedirect.com/science/article/abs/pii/S095965261930246X?via%3Dihub},
  year = {2019}
}