Enablers and barriers in circular economy : the case of EstoniaKüttim, Merle; Gerstlberger, Wolfgang Dieter; Hurt, Ulrika; Kotov, Arseni; Kull, Margit; Niine, Tarvo; Ahmadov, Tarlan; Tuisk, TarmoProceedings of XXXIV ISPIM innovation conference2023 https://conferencesubmissions.com/ispim/ljubljana2023/documents/1304152051_Paper.pdf Replication and upscaling of Smart Cities in Academia and practice: concepts, barriers and enablersSoe, Ralf-Martin24th Annual International Conference on Digital Government Research: dg.o 2023 : Together in the unstable world: Digital government and solidarity, Gdańsk, Poland, 11-14 July, 2023 : proceedings2023 / p. 115−121 https://doi.org/10.1145/3598469.3598481