Vieri Del Bianco Luigi Lavazza Sandro Morasca Davide Taibi Quality of Open Source Software: The QualiPSo Trustworthiness Model. 199-212 2009 OSS http://dx.doi.org/10.1007/978-3-642-02032-2_18 conf/oss/2009 db/conf/oss/oss2009.html#BiancoLMT09