@article{JaentschiL307 ,year = "2002" ,journal = "Leonardo Journal of Sciences" ,jabbre1 = "Leonardo J. Sci." ,jabbre2 = "Leonardo J Sci" ,title = "Free software development. 1. Fitting statistical regressions" ,author = "Jäntschi, Lorentz" ,volume = "1" ,number = "1" ,pages = "31-52" ,ISSN = "1583-0233" ,url = "http://lori.academicdirect.org/pdfs/100/014.pdf" }