COPYRIGHTS
The Proceedings of the Third Bulgarian National Congress on Physical Sciences
These Proceedings are published under copyright of the Heron Press Ltd.
We wish to inform the authors that the transfer of the copyright to the Heron Press Ltd.
should not prevent an author from publishing an article in a journal quoting the original first publication.
This copyright is only to protect the Heron Press Ltd. against use of the same material in similar publications.
ISBN 978-954-580-364-2
