1. Developing technology for large-scale production of forest chips. Wood Energy Technology Programme 1999–2003;Hakkila,2004
2. Nylund M. Grothantering vid Alholmen (Logging residue management at Alholmen). Örnsköldsvik; 2005.
3. Stumps—an unutilised reserve;Tekes,2004
4. Rolfsson H. På hygget sprudlar energin. Stubben ger dubbelt upp mot stamveden (On the clearcut the energy is bubbling. The stump gives twice as much as stem wood). SKOG, 2006.
5. The effects of slash and stump removal on productivity and quality of forest regeneration operations—preliminary results;Saarinen;Biomass and Bioenergy,2006