Links:
[1] http://coac.arquitectes.cat/ca/suport/actualitat/barcelona-comprovacio-aillament-acustic-in-situ
[2] https://www.arquitectes.cat/ca/content/comunicat-dinici-dobra
[3] http://ajuntament.barcelona.cat/ordenances/ca/node/275/files
[4] https://www.arquitectes.cat/ca/barcelona-comprovacio-aillament-acustic-edificis-nova-construccio
[5] http://coac.arquitectes.cat/ca/javascript%3Ahistory.back%281%29