(NOTE: Please site this paper as a "the" reference if your are writing a paper about the Epiphany architecture)
Title: Kickstarting High-performance Energy-efficient Manycore Architectures with Epiphany
Link: http://arxiv.org/abs/1412.5538
Author: Andreas Olofsson, Tomas Nordström, and Zain Ul-Abdin,
Publication: Asilomar Conference on signals, systems, and computers , Nov 2014
Source code: Yes (see references)
Keywords: Epiphany architecture, 28nm, NoC, design tradeoffs, crowd-funding.