Apple MacBook Pro with Retina Display (13-inch, 2013) review: Not a Retina MacBook Air, but awfully close - CNET
How to upgrade Apple MacBook Pro RAM - YouTube
2.3Ghz i7 8Gb Ram Logic Board for 15" MacBook Pro Retina A1398 Mid 2012 / DG | eBay
MacBook Pro (Retina, 13-inch, Late 2012) - Technical Specifications
Samsung ram Memory Upgrade DDR3 PC3 12800, 1600MHz, 204 PIN, SODIMM for 2012 Apple MacBook Pro's, 2012 iMac's, and 2011/2012 Mac Mini's (8GB kit (2 x 4GB)) at Amazon.com
13″ MacBook Pro teardown: Easy SSD, trackpad access, no room for RAM | Ars Technica
2.6 GHz 16GB RAM Retina Logic Board 820-3332-A for MacBook Pro 15" A1398 2012 | eBay
MacBook Pro 15" Retina Display Mid 2012 Teardown - iFixit
display - How can my mid-2012 MacBook Pro Retina 15 run a 4K panel at 30Hz over HDMI? - Ask Different
Apple MacBook Pro Retina 15-Inch "Core i7" 2.4GHz A1398 ME664LL/A 2013 – Coretek Computers
MacBook Pro 13" Retina Display Late 2012 Teardown - iFixit
Upgrading My MacBook Pro i5 (Mid 2012) With 16GB Memory - miapple.me - Tech.Blog
Macbook Pro 15" Retina A1398 Take Apart (2012 Model) - YouTube