* *the power of gifts: organizing social relationships in open source communities* (information systems journal) by Berquist, Ljungberg)
* *evidences in the evolution of OS projects through changelog analyses* by Capiluppi, Lago, Morisio
* *[NixOS: a purely functional Linux Distribution](http://people.cs.uu.nl/andres/NixOS.html)* by Dolstra, Löh
-* *[clustering and dependencies in free/open source software development: methodology and tools](dxm.org/papers/toulouse2/cluster-final.pdf)* by Ghosh
+* *[clustering and dependencies in free/open source software development: methodology and tools](http://dxm.org/papers/toulouse2/cluster-final.pdf)* by Ghosh
+* *[putting it all in the trunk: incremental software engineering in the FreeBSD
+Open Source
+project](http://www.ruc.dk/~nielsj/research/publications/freebsd.pdf)* by
+Jorgensen
+* *[on the security of open source
+software](http://www.blackwell-synergy.com/doi/pdf/10.1046/j.1365-2575.2002.00118.x)*
+by Payne
+* *[Code quality analysis in open source software development](http://www.blackwell-synergy.com/doi/pdf/10.1046/j.1365-2575.2002.00117.x) by Stamelos, Angelis, Oikonomou, and Bleris
### printed