Pin Change Interrupts on ATtiny85 – The Wandering Engineer
Getting started with the new ATtiny chips - Programming the Microchip's 0-series and 1-series ATtiny with the Arduino IDE - Electronics-Lab.com
Amazon.com: The ATTINY Project - Why Forth?: Combined English and German Version (German Edition) eBook: Heinrichs, Georg , Pintaske, Juergen: Kindle Store
Amazon.com: Seazoon Tiny 85 Board with AtTiny 85, MicroUSB, Digispark for Arduino IDE Compatible #S6-ATTINY85 Connector: Home Audio & Theater