Śledziewska, Katarzyna, и Renata Gabryelczyk. „Diagnosis of the Digital Competence Gap Between SMEs in Poland and the EU“. ENTRENOVA - ENTerprise REsearch InNOVAtion 1, no. 1 (Октобар 31, 2015): 493–499. приступљено Септембар 27, 2024. https://hrcak.srce.hr/ojs/index.php/entrenova/article/view/14622.