APT groups catalogue:

Report: https://www.bellingcat.com/app/uploads/2015/10/MH17-The-Open-Source-Evidence-EN.pdf

Three-year update: https://www.bellingcat.com/news/europe/2017/07/17/mh17-open-source-investigation-three-years-later/

https://www.bellingcat.com/news/europe/2018/10/09/full-report-skripal-poisoning-suspect-dr-alexander-mishkin-hero-russia/

https://www.bellingcat.com/news/2020/12/14/fsb-team-of-chemical-weapon-experts-implicated-in-alexey-navalny-novichok-poisoning/

Methodology: https://www.bellingcat.com/resources/2020/12/14/navalny-fsb-methodology/

https://www.bellingcat.com/news/2022/02/27/follow-the-russia-ukraine-monitor-map/