http://www.itsnicethat.com/articles/pictograms-symbols-branding-visual-language-digital-age-lee-coomber-lippincott-opinion-010616
https://stickybranding.com/make-your-brand-iconic-the-power-of-symbols-in-branding/
http://www.cbsnews.com/news/online-businesses-are-really-user-interface-businesses/
https://www.usertesting.com/blog/2015/08/04/user-friendly-ui-icons/
http://smallbusiness.chron.com/reasons-small-business-needs-online-presence-27742.html
https://medium.com/blu-mint-digital/ui-design-vs-ux-design-whats-the-difference-af97c2ff052a
https://books.google.co.uk/books?id=whQWBAAAQBAJ&pg=PA135&lpg=PA135&dq=poor+online+presence+offline+businesses&source=bl&ots=D4mxwcL0Bo&sig=YEFVrpUgcnWzpR9750UCuSX-tOs&hl=en&sa=X&ved=0ahUKEwie2bPN_pzTAhVFOMAKHSAwDWsQ6AEIUTAJ#v=onepage&q=poor%20online%20presence%20offline%20businesses&f=false
