* *collective dynamics of "small-world" networks*, by Watts, Strogatz [Nature (393)(1998) 440-442]
* *motivation of software developers in open source projects: an Internet-based survey of contributors to the Linux kernel* (should be about burnout), by Hertel, Niedner, Hermann
* *quality and the reliance on individuals in free software project* (3rd workshop on open source software engineering) by Michlmayr and Hill