Witold Abramowicz Dominik Flejter Business Information Systems Workshops, BIS 2009 International Workshops, Poznan, Poland, April 27-29, 2009. Revised Papers 37 http://dx.doi.org/10.1007/978-3-642-03424-4 2009 978-3-642-03423-7 BIS (Workshops) Lecture Notes in Business Information Processing Springer db/conf/bis/bisw2009.html