1. Wolf: Review of Vocational Education – The Wolf Report (2011).
https://www.gov.uk/government/publications/review-of-vocational-education-the-wolf-report
2. Geary, D.: Early foundations for mathematics learning and their relations to learning disabilities (2013).
http://cdp.sagepub.com/content/22/1/23.full.pdf+html
3. Yu-Sien, L.: Fostering creativity through education-a conceptual framework of creative pedagogy.
http://www.scirp.org/Journal/PaperDownload.aspx?paperID=6710
4. Alsop, G., Tompset, T.C.: Making sense of ‘pure’ phenomenography in information and communication technology in education. ALT-J. 14(3), 241–259 (2006).
https://doi.org/10.1080/09687760600837058
5. Booth, S.: On phenomenography, learning and teaching. High. Educ. Res. Dev. 16, 135–157 (1997)