https://www.taylorfrancis.com/chapters/edit/10.4324/9781003253990-4/ethos-amateurism-support-integration-ecological-approach-learning-development-football-academies-roberts-martyn-rothwell-haydn-morgan-james-vaughan-carl-woods?context=ubx&refId=282d7df7-2da4-4adf-8e9e-699a2b99561b