http://www.youthcentral.vic.gov.au/studying-training/studying-tips-resources/top-10-study-tips
https://vlacs.org/top-10-study-tips-students
https://www.oxfordlearning.com/how-to-study-effectively
https://urskola.se/Produkter/176958-Plugga-battre-Koncentration
http://bloggar.ur.se/orkaplugga