Zolfaghari, S., Mousavi, S.M. and Antuchevičienė, J. 2021. A type-2 fuzzy optimization model for project portfolio selection and scheduling incorporating project interdependency and splitting. Technological and Economic Development of Economy. 27, 2 (Apr. 2021), 493-510. DOI:https://doi.org/10.3846/tede.2021.14652.