Barandovski, L., T. Stafilov, R. Sajn, M. Frontasyeva, and K. Baceva. “Air Pollution Study in Macedonia Using a Moss Biomonitoring Technique, ICP-AES and AAS”. Macedonian Journal of Chemistry and Chemical Engineering, vol. 32, no. 1, June 2013, pp. 89–107, doi:10.20450/mjcce.2013.137.