http://www.google.com.ar/patents/WO2002087721A2?cl=en&hl=fr
http://www.tandfonline.com/doi/abs/10.1080/01425919008941472?journalCode=gsol19#.VP8ZcuGJ098
http://www.aub.edu.lb/news/Pages/malaeb-ce-phd.aspx
Analysis of a parallel double glass solar still with separate condenser http://www.sciencedirect.com/science/article/pii/S096014819800768X