Szomolányi, Karol, Martin Lukáčik, and Adriana Lukáčiková. 2018. “Elasticity of Substitution in Post-Communist Economies”. ENTRENOVA - ENTerprise REsearch InNOVAtion 4 (1):25-31. https://hrcak.srce.hr/ojs/index.php/entrenova/article/view/13839.