Kosińska, Joanna, Jacek Kosiński, Slawomir Zieliński, and Krzysztof Zieliński. 2012. “Flexible Organization of Repositories for Provisioning Cloud Infrastructures”. Computing and Informatics 31 (4):743-57. http://147.213.75.17/ojs/index.php/cai/article/view/1103.