
http://www.css.ethz.ch/content/dam/ethz/special-interest/gess/cis/center-for-securities-studies/pdfs/ST2018.pdf

https://vuosikirja.supo.fi/documents/62399122/66519032/SUPO+Yearbook+2022.pdf/109369e6-13c3-ee60-474e-eff9c4d44217/SUPO+Yearbook+2022.pdf?t=1679642311270

https://www.npaid.org/files/Mine-action-and-disarmarment/Clearing_the_Mines_2025.pdf