Sources:
https://www.iucnredlist.org/species/194237/2305530
https://www.amorim.com/en/cork/curiosities/
https://www.apcor.pt/cortica/#O-que-e
https://www.nature.com/articles/s41598-019-55193-9
https://bittergrounds.com/quercus-suber-stamps-magnficent-cork-stamps-from-portugal/
https://www.amorimcork.com/en/cork-and-wine/raw-material-and-production-process/