D. Taibi, L. Lavazza, and S. Morasca, OpenBQR: a framework for the assessment of OSS " , Open Source Software, 2007.

V. Del-bianco, M. Chinosi, L. Lavazza, S. Morasca, and D. Taibi, How European software industry perceives OSS trustworthiness and what are the specific criteria to establish trust in OSS, 2008.

V. Del-bianco, L. Lavazza, S. Morasca, and D. Taibi, Quality of Open Source Software: The QualiPSo Trustworthiness Model, The 5th International Conference on Open Source Systems OSS09, pp.3-6, 2009.
DOI : 10.1016/S0164-1212(02)00065-1

S. S. Shapiro and M. B. Wilk, An analysis of variance test for normality (complete samples, Biometrika, vol.52, pp.3-4, 1965.

A. Tawileh, O. Rana, and S. Mcintosh, A Social Networking Approach to F/OSS Quality Assessment, Proceeding of the International Conference on Computer Mediated Social Networking (ICCMSN'08), p.14, 2008.
DOI : 10.1007/978-3-642-02276-0_16

. Eclipse, The Open Source Developer Report Web published: http://www.eclipse.org/org/press-release/Eclipse_Survey_2009_final, p.14, 2009.

A. Origin, Method for Qualification and Selection of Open Source software (QSOS), version 1 Business Readiness Rating for Open Source -A Proposed Open Standard to Facilitate Assessment and Adoption of Open Source Software, BRR 2005 - RFC 1

A. Mockus, R. T. Fielding, and J. D. Herbsleb, Two case studies of open source software development: Apache and Mozilla, ACM Transactions on Software Engineering and Methodology, vol.11, issue.3, 2002.
DOI : 10.1145/567793.567795

A. Mockus and D. Weiss, Interval quality, Proceedings of the 13th international conference on Software engineering , ICSE '08, 2008.
DOI : 10.1145/1368088.1368190

A. Mockus, P. Zhang, and P. L. Li, Predictors of customer perceived software quality, International Conference on Software Engineering 2005, 2005.