https://web.archive.org/web/20201104133941/https://www.mef.gob.pe/en/notas-de-prensa-y-comunicados/6289-estado-peruano-se-defendera-ante-demanda-presentada-por-odebrecht
https://www.iareporter.com/articles/scandal-ridden-multinational-makes-good-on-earlier-threats-to-initiate-treaty-based-arbitration-against-peru/ (requires subscription)
https://globalarbitrationreview.com/odebrecht-brings-treaty-claim-against-peru (requires subscription)
http://arbitrationblog.kluwerarbitration.com/2020/04/02/on-corruption-in-investor-state-arbitration-the-case-of-odebrecht-against-the-peruvian-state/