Р. Пандурска, „Communications in the Social Security Administrations as Part of the Measures of Corporate Social Responsibility in their Activity Optimization“, НТ, бр. 3, стр. 121–133, Авг 2020, отворен на: Юли 23, 2026. достъпен на: https://yb.e-dnrs.org/index.php/rp/article/view/5363