Bartosz Perkowski participated in the JURIX2011 conference (Legal Knowledge and Information Systems). The conference took place on December 14-16 in Vienna, Austria. During the conference, he presented paper “System for Detection of Illegal Drugs E-Trading” written by DIS members: Witold Abramowicz, Piotr Stolarski, Agata Filipowska, Bartosz Perkowski and Krzysztof Węcel.