(en) Monique Bruinsma en Toine Spapens (april 2018). Terrorist access to firearms in the Netherlands. Gearchiveerd op 27 juni 2023. Synthesis report Firearms Acquisition by Terrorists in Europe: Research findings and policy Recommendations of Project SAFTE (international research project studying the acquisition of firearms by terrorists in Europe) : 285-325
(en) Monique Bruinsma en Toine Spapens (april 2018). Terrorist access to firearms in the Netherlands. Gearchiveerd op 27 juni 2023. Synthesis report Firearms Acquisition by Terrorists in Europe: Research findings and policy Recommendations of Project SAFTE (international research project studying the acquisition of firearms by terrorists in Europe) : 285-325