Annals of 'Constantin Brancusi' University of Targu-Jiu. Economy Series / Analele Universităţii 'Constantin Brâncuşi' din Târgu-Jiu Seria Economie; 2017, Issue 6, p18-26, 9p
Annals of 'Constantin Brancusi' University of Targu-Jiu. Economy Series / Analele Universităţii 'Constantin Brâncuşi' din Târgu-Jiu Seria Economie; 2015, Issue 5, p160-169, 10p