Analyzing the Anatomy of GNU/Linux Distributions: Methodology and Case Studies (Red Hat and Debian) - González-Barahona JM; Robles G; Ortuño-Pérez M; Rodero-Merino L; Centeno-González J; Matellán-Olivera V; Castro-Barbero E; de-las-Heras-Quirós P (Free Open Source Software Development, 2004)