The Influence of Heavy Work Investment on Work Outcomes in the Hospitality Industry in Serbia Autori: Slobodan Čerović, Ivana Blešić, Jelena Tepavčević, Svetlana Vukosav, Vuk Garača, Milan Bradić Časopis: www.amfiteatrueconomic.ro DOI: 10.24818/EA/2020/S14/1243