Source: https://www.researchgate.net/profile/Ulf-Ehlers/publication/332028491_Future_Skills_-_The_Future_of_Learning_and_Higher_education_Results_of_the_International_Future_Skills_Delphi_Survey/links/5c9b827492851cf0ae9c5c97/Future-Skills-The-Future-of-Learning-and-Higher-education-Results-of-the-International-Future-Skills-Delphi-Survey.pdf