Association of Municipalities Polish Network “Energie Cités” (PNEC)
The Romanian Network of Energy Cities (OER)
National Trust EcoFund (NTEF)
Guidehouse
Centre for Renewable Energy Sources and Saving (CRES)
Environ Association
SEVEn – The Energy Efficiency Center z.ú.
Independent Institute for Environmental Issues UfU e.V. Berlin
PNEC – Association of Municipalities Polish Network “Energie Cités”
adelphi research gGmbH