Jonas Gamalielsson Björn Lundell Brian Lings The Nagios Community: An Extended Quantitative Analysis. 85-96 2010 OSS https://doi.org/10.1007/978-3-642-13244-5_7 http://dl.ifip.org/db/conf/oss/oss2010/GamalielssonLL10.pdf conf/oss/2010 db/conf/oss/oss2010.html#GamalielssonLL10