1. Pelletheizungen - Marktübersicht,2013
2. Marktübersicht Hackschnitzelheizungen,2017
3. ISO 17225-2: Solid Biofuels - Fuel Specifications and Classes - Part 2: Graded Wood Pellets;International Organization for Standardization,2014
4. ISO 17225-4: Solid Biofuels - Fuel Specifications and Classes - Part 4: Graded Wood Chips;International Organization for Standardization,2014
5. ISO 17225-6: Solid Biofuels - Fuel Specifications and Classes - Part 6: Graded Non-woody Pellets;International Organization for Standardization,2014