Suder, Asli, and Cengiz Kahraman. “Multicriteria Analysis of Technological Innovation Investments Using Fuzzy Sets”. Technological and Economic Development of Economy 22, no. 2 (March 24, 2016): 235-253. Accessed July 21, 2019. https://journals.vgtu.lt/index.php/TEDE/article/view/712.