In this video channel you will find a lot of materials related to the lecture courses that I lead. These courses are not public. The lecturers are the copyright holders of the materials in these courses. All materials for these courses can only be used for study purposes only by participants enrolled officially and eligible to attend the relevant course (full-time, part-time or distance). Resources may not be made available to others, or modified or distributed in the form of derivative materials. Any violation of this prohibition shall be subject to sanctions under the Copyright and Related Rights Act, as well as under the applicable legislation of the Republic of Bulgaria.