1. European Commission (2014) State of play on the sustainability of solid and gaseous biomass used for electricity, heating and cooling in the EU. https://ec.europa.eu/energy/sites/ener/files/2014_biomass_state_of_play_.pdf. Accessed 26 Apr 2018
2. Lechner H (2017) The Future of Biomass in the Renewables Portfolio. https://www.drax.com/wp-content/uploads/2017/12/Future-biomass-renewables-portfolio-Poyry-Drax.pdf. Accessed 2 Apr 2018
3. Thrän D, Schaubach K, Peetz D et al (2019) The dynamics of the global wood pellet markets and trade - key regions, developments and impact factors. Biofuels Bioprod Biorefin 13:267–280. https://doi.org/10.1002/bbb.1910
4. Colechin M, Malmgren A (2005) Best Practice Brochure: Co-Firing of Biomass (Main Report). In: Crown. http://webarchive.nationalarchives.gov.uk/tna/+/http:/www.dti.gov.uk/files/file20737.pdf. Accessed 15 Feb 2017
5. Petersen CB (2011) Conversion of a traditional coal fired boiler to a multi fuel biomass unit. In: Burmeister Wain Energy A/S – BWE. http://www.bwe.dk/download/articles_pdf/art-pge2011.pdf. Accessed 1 May 2018