ARTICLES
In English:
https://www.bearfootinthepark.com/en/products2-2/people/item/154-yannis-grillis-en
In Greek:
https://www.lifo.gr/culture/design/kalliergontas-noyfara-lotoys-kai-irides-ston-marathona
https://www.bearfootinthepark.com/el/products2/people/item/147-yannis-grillis
https://www.kathimerini.gr/k/travel/561569464/mia-mera-sto-agroktima/