1. Ruralis-Institute for Rural and Regional Research, University Centre Dragvoll, Trondheim, Norway;
2. Agrarian Engineering Section, Rural Engineering Department Faculty of Agronomy and Forest Engineering, Eduardo Mondlane University, Maputo, Mozambique;
3. Department of Food Technology, Engineering and Nutrition, Lund University, Lund, Sweden;
4. Energy and Building Design Division, Lund University, Lund, Sweden