Digital repository
All materials that are available in the repository 
of the University Library "Svetozar Markovic" are in open access.  You can use them for free and without any commercial purpose. However, if you wish to use this material for commercial purposes, you need a written consent of the University Library "Svetozar Markovic".  If you require materials in a higher resolution, those can be prepared for you after you make a request to the Library.