+ Sustainable City Council Programme (+SCC). Barcelona City Council

Procura+ Campaign. ICLEI - Local Governments for Sustainability

Green public procurement. European Comission. DG Environment

Sustainable Public Procurement. United Nations Environment Programme (UNEP)

Ecological public procurement. Ministry of Agriculture, Food and Environment

Green Public Procurement. Department of Territory and Sustainability, Government of Catalonia

Responsible Consumption and Waste Prevention. Network of Cities and Peoples towards Sustainability. Barcelona Provincial Council