2026

• Øyen, Vebjørn; Johnsen, Jan William; Heitmann, Odin. (2026) Early digital evidence coordination in major investigations: a gap between formal readiness and operational practice. Policing: A Journal of Policy and Practice
  Academic article
• Heitmann, Odin; Johnsen, Jan William. (2026) Cybercrime investigations in practice: Insights from the LockerGoga ransomware attack on Norsk Hydro. Forensic Science International: Digital Investigation
  Academic article

2023

• Dorotic, Matilda; Johnsen, Jan William. (2023) Seksuell utnyttelse av barn over internett: Rapport om analyse av teknologiske faktorer som påvirker produksjon og deling av materiale som seksuelt utnytter barn over internett. Norges teknisk-naturvitenskapelige universitet
  Research report

2022

• Johnsen, Jan William. (2022) Interdisciplinary approach to criminal network analysis: Opportunities and challenges. Norges teknisk-naturvitenskapelige universitet
  Doctoral thesis

2020

• Johnsen, Jan William; Franke, Katrin. (2020) Identifying Proficient Cybercriminals Through Text and Network Analysis.
  Academic chapter

2019

• Johnsen, Jan William; Franke, Katrin. (2019) The impact of preprocessing in natural language for open source intelligence and criminal investigation. IEEE International Conference on Big Data (Big Data)
  Academic article

2018

• Johnsen, Jan William; Franke, Katrin. (2018) Identifying Central Individuals in Organised Criminal Groups and Underground Marketplaces. Lecture Notes in Computer Science (LNCS)
  Academic article
• Johnsen, Jan William; Franke, Katrin. (2018) Digital Forensics Report for Dagens Næringsliv. Norges teknisk-naturvitenskapelige universitet
  Research report

2017

• Johnsen, Jan William; Franke, Katrin. (2017) Feasibility Study of Social Network Analysis on Loosely Structured Communication Networks. Procedia Computer Science
  Academic article
• Shalaginov, Andrii; Johnsen, Jan William; Franke, Katrin. (2017) Cyber crime investigations in the era of big data.
  Academic chapter