- http://www.wnpism.uw.edu.pl/
- http://www.ips.uw.edu.pl/
- http://bazekon.icm.edu.pl/bazekon/element/bwmeta1.element.ekon-element-issn-1640-1808
- http://cejsh.icm.edu.pl/cejsh/element/bwmeta1.element.cejsh-512d115a-3223-422a-bbc2-cb87ba6a75e3?q=c1f7e4bd-5e67-4377-9037-b5531eabdaf7$1&qt=IN_PAGE
- https://journals.indexcopernicus.com/search/details?id=26538
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