Procedia Procedia Economics and Finance. -- No. 34. 9th International Scientific Conference "Business Economics and Management 2015 (BEM, 2015), 15. - 16. 10. 2015, Zvolen, Slovakia (2015). -- 2015. -- ISSN : 2212-5671. In: Procedia Economics and Finance. -- ISSN 2212-5671. -- Amsterdam : Elsevier Ltd.