2019

• Fjørtoft, Kristian; Morken, John; Hanssen, Jon Fredrik; Briseid, Tormod. (2019) Pre-treatment methods for straw for farm-scale biogas plants. Biomass & Bioenergy. volum 124.
  Vitenskapelig artikkel

2017

• Morken, John; Gjetmundsen, Magnus Olimstad; Fjørtoft, Kristian. (2017) Determination of kinetic constants from the co-digestion of dairy cow slurry and municipal food waste at increasing organic loading rates. Renewable Energy. volum 117.
  Vitenskapelig artikkel

2014

• Fjørtoft, Kristian; Morken, John; Gjetmundsen, Magnus. (2014) Dokumentasjon av biogassanlegget på Tomb VGS. 2014. IMT Rapport serie (55).
  Rapport
• Fjørtoft, Kristian; Morken, John; Hanssen, Jon Fredrik; Briseid, Tormod. (2014) Methane production and energy evaluation of a farm scaled biogas plant in cold climate area. Bioresource Technology. volum 169.
  Vitenskapelig artikkel

2013

• Grimsby, Lars Kåre; Fjørtoft, Kristian; Aune, Jens Bernt. (2013) Nitrogen mineralization and energy from anaerobic digestion of jatropha press cake. Energy for Sustainable Development. volum 17 (1).
  Vitenskapelig artikkel