Ramani, S; Dragun, Z; Kapetanović, D; Kostov, V; Jordanova, M; Erk, M; Hajrulai-Musliu, Z. "Surface water characterization of three rivers in the lead/zinc mining region of northeastern Macedonia". Arch Environ Contam Toxicol. 66: 514–28. doi:10.1007/s00244-014-0012-z. PMID24626792.
Ministry of Urban Planning, Construction and Environment (8 April 2007). "Statement of Environment Report". Ministry of Urban Planning, Construction and Environment. Archived from the original on 27 September 2007. Retrieved 27 August 2007.
nih.gov
pubmed.ncbi.nlm.nih.gov
Ramani, S; Dragun, Z; Kapetanović, D; Kostov, V; Jordanova, M; Erk, M; Hajrulai-Musliu, Z. "Surface water characterization of three rivers in the lead/zinc mining region of northeastern Macedonia". Arch Environ Contam Toxicol. 66: 514–28. doi:10.1007/s00244-014-0012-z. PMID24626792.
soros.org.mk
Soros MK (8 April 2007). "Water Pollution". Soros MK. Archived from the original on 8 January 2009. Retrieved 27 August 2007.
web.archive.org
Soros MK (8 April 2007). "Water Pollution". Soros MK. Archived from the original on 8 January 2009. Retrieved 27 August 2007.
Ministry of Urban Planning, Construction and Environment (8 April 2007). "Statement of Environment Report". Ministry of Urban Planning, Construction and Environment. Archived from the original on 27 September 2007. Retrieved 27 August 2007.