Affordable and Energy-Efficient Cloud Computing Clusters: The Bolzano Raspberry Pi Cloud Cluster Experiment. - Pekka Abrahamsson; Sven Helmer; Nattakarn Phaphoom; Lorenzo Nicolodi; Nick Preda; Lorenzo Miori; Matteo Angriman; Juha Rikkilä; Xiaofeng Wang 001; Karim Hamily; Sara Bugoloni (CloudCom (2), 2013)