http://globalarbitrationreview.com/article/1141975/new-fronts-open-in-spanish-solar-battle (requires subscription)
https://www.iareporter.com/articles/hearings-loom-in-previously-unpublicized-stockholm-energy-charter-treaty-claim-as-another-investor-pursues-icsid-claim/ (requires subscription)
http://www.juve.de/nachrichten/verfahren/2017/06/investitionsschutz-portigon-verklagt-mit-freshfields-spanien-wegen-gekappter-solarfoerderung
https://www.iareporter.com/articles/arbitrator-comings-goings-binnie-bulnes-and-kim-are-tapped-to-chair-a-trio-of-new-proceedings-as-pryles-cheng-and-ramirez-hernandez-resign-from-cases/ (requires subscription)