Atanasov, Atanas Tsvyatkov, Marinova, Rumyana Mariyanova Non-financial Reporting in the Extractive Industry - Regulations and Application = Нефинансово отчитане в добивната индустрия - регулации и приложение,
St. Ivan Rilski Publ. House [MGU], 2019, pp. 58 - 64, ISSN 2682-9525 (print) ; ISSN 2683-0027 (online).