How-To: Upgrade the SSD in your MacBook Air or Retina MacBook Pro, boosting size & speed - 9to5Mac
13-inch MacBook Air (early 2015) review - Macworld UK
How to Upgrade RAM on MacBook Pro, iMac & More | AVG
820-3437-B A1466 Logic Board for Apple MacBook Air 13 inch A1466 (Mid 2013 – Early 2014) with Intel Core i7 1.7Ghz 8GB RAM MD760LL/A* MD760LL/B* - WIT Computers
Absolutely Insane Battery Life - The 2013 MacBook Air Review (13-inch)
Is there a way to upgrade the RAM in an early 2015 MacBook Pro without voiding the warranty? - Quora