Links:
[1] http://coac.arquitectes.cat/en/node/27191
[2] https://ajuntament.barcelona.cat/hisenda/sites/default/files/normativa/2021-01/3.3-taxes-per-serveis-urbanistics.pdf
[3] https://seuelectronica.ajuntament.barcelona.cat/oficinavirtual/ca/tramit/20120001024
[4] http://coac.arquitectes.cat/en/javascript%3Ahistory.back%281%29