Mancheva-Ali, Olga, i Ilyan Lilov. „Opportunities to Achieve a Sustainable Restaurant Business“. ENTRENOVA - ENTerprise REsearch InNOVAtion 4, no. 1 (listopad 31, 2018): 321–329. Pristupljeno svibanj 19, 2024. https://hrcak.srce.hr/ojs/index.php/entrenova/article/view/13913.