Койчева, Райна. „Protection of Temporary Workers in 2008/104 EC Directive on Temporary Agency Work - Flexibility or Security?“. Научни трудове, no. 2 (Май 22, 2018): 183–190. отворен на Юли 22, 2026. https://bjiep.e-dnrs.org/index.php/rp/article/view/5575.