1. UNI EN ISO 14040: 2006. Environmental management – life cycle assessment – principles and framework.
2. UNI EN ISO 14044: 2006. Environmental management – life cycle assessment – requirements and guidelines.
3. TREE s.r.l. Preliminary environmental study, project for the installation of a 1778.48kWp ground-mounted photovoltaic plant in partial self-consumption in the municipality of Marsciano, in the locality Via Larga. Perugia (Italy). Internal company technical report; May 19, 2009.
4. TREE s.r.l. Explanatory report, project for the installation of a 1778.48kWp ground-mounted photovoltaic plant in partial self-consumption in the municipality of Marsciano, in the locality Via Larga. Perugia (Italy). Internal company technical report; May 19, 2009.
5. TerniEnergia S.p.A. Technical report, project for the installation of a 1778.48kWp ground-mounted photovoltaic plant in partial self-consumption in the municipality of Marsciano, in the locality Via Larga. Terni (Italy). Internal company technical report; May 17, 2009.