Open access

Research Announcements “Heritage BG” is an open-access journal, and all its content is available free of charge. Without seeking prior permission from the publisher or authors, users have the right to read, download, copy, distribute, print, search, or link to the full texts of articles or to use them for other lawful non-commercial purposes. The articles in the journal are licensed under a Creative Commons Attribution-NonCommercial-NoDerivates 4.0 International (CC BY-NC-ND 4.0)