1. www.life-enhancement.com/magazine/article/578-omega-3-fatty-acids-improve-cognitive-function
2. www.nhs.uk/Conditions/vitamins-minerals/Pages/Vitamin-B.aspx
3. www.nhs.uk/Conditions/vitamins-minerals/Pages/Vitamin-B.aspx
4. www.theguardian.com/education/2014/jan/08/five-secrets-of-successful-revising
5. www.journals.sagepub.com/doi/abs/10.1177/0956797612441220?etoc=&