Love this "thumb zone" for mobile interaction from Facebook Paper's gestural hell - Scott Hurff
#responsive navigation optimization
How to Design for Thumbs in the Era of Huge Screens
Zones showing thumb access for a two-handed grip on a phablet screen.
Le Tram est à nous (Tramway de Brest) by Gwénolé Jaffrédou, via Behance
7 Rules for Creating Gorgeous UI (Part 1) — Medium
hard to reach areas on large smartphones
Drawings showing that the most common smartphone grips are thumb-driven.
How We Hold Our Gadgets · An A List Apart Article
Hci guidelines for touchscreen reach.