@misc{obernosterer2001infrastructure,
  title = {Infrastructure density and Pb stocks in Vienna in kg Pb per 1000 m2 floorspace}
  author = {Obernosterer, R. ; Brunner, P. H.},
  url = {https://link.springer.com/article/10.1023/A:1017520624823},
  year = {2001}
}