Burda, Andrzej, and Zdzisław Hippe. “Uncertain Data Modeling: The Case of Small and Medium Enterprises”. Regional Barometer. Analyses & Prognoses, no. 3 (21) (October 11, 2010): 21–26. Accessed November 8, 2024. https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/1363.