Links:
[1] http://coac.arquitectes.cat/es/se-aprueba-el-funcionamiento-del-registro-p%C3%BAblico-de-contratos-de-la-generalitat
[2] http://coac.arquitectes.cat/sites/default/files/users/14663/ordre-eco-294-2015.pdf
[3] http://coac.arquitectes.cat/es/javascript%3Ahistory.back%281%29