Jelena Grujic and Marija Mitrovic visited Jozef Stfen Institut, Ljubljana, Slovenia, as a part of bilateral project BI-RS/08-09-047. Collaboration was established with professor Bosiljka Tadic and members of her group in investigation of dynamical and structural properties of complex networks. During their one month visit, Jelena Grujic gave a talk on "E-social Networks: Movies Recommendations", while Marija Mitrovic presented her work "Network of networks: modeling modularity of real world".