The collection “Dissertation abstracts, defended at Sofia University “St. Kliment Ohridski” includes books of abstracts of all dissertations defended at Sofia University “St. Kliment Ohridski” from 2011 to the present. In compliance with the Rector’s Order, all Ph.D. students who defended their dissertation thesis at the University are obliged to submit a paper and an electronic copy of the abstract of their work to the library. The paper copies of the dissertation abstracts are stored in the main stacks of the Central University Library, and the electronic copies, at a specialized digital library collection. The collection “Dissertation abstracts, defended at Sofia University “St. Kliment Ohridski” is divided into sub-collections according to various university faculties and departments. This allows easier navigation and tracking of the scientific interests of the university researchers.