Zolfaghari, S., S. M. Mousavi, and J. Antuchevičienė. “A Type-2 Fuzzy Optimization Model for Project Portfolio Selection and Scheduling Incorporating Project Interdependency and Splitting”. Technological and Economic Development of Economy, vol. 27, no. 2, Apr. 2021, pp. 493-10, doi:10.3846/tede.2021.14652.