© 2011 S Angelova, M Jordanova, B Spassov, V Shivarov, M Simeonova, I Christov, P Angelova, K Alexandrova, A Stoimenov, V Nikolova, I Dimova, P Ganeva, N Tzvetkov, E Hadjiev, S Toshkov, published by Macedonian Academy of Sciences and Arts
This work is licensed under the Creative Commons License.