Krylovas, Aleksandras, Natalja Kosareva, and Julija Karaliūnaitė. “Fuzzy Classification of Dichotomous Test Items and Social Indicators Differentiation Property”. Technological and Economic Development of Economy 24, no. 4 (September 10, 2018): 1755-1775. Accessed November 9, 2024. https://jcem.vgtu.lt/index.php/TEDE/article/view/5213.