@misc{statistics2019material,
  title = {Material amount of buildings by typology in Mikkeli}
  author = {Statistics Finland},
  url = {https://pxnet2.stat.fi/PXWeb/pxweb/fi/StatFin/StatFin__asu__rakke/statfin_rakke_pxt_116g.px/},
  year = {2019}
}