Azis M, Defung F, Ramadhani H, Purnamasari I, Darma DC, Nurhikmat M. Analytical framework for ESG portfolio optimization through ecotourism investment management; evidence from the Indonesian banking sector in IKN buffer cities. EiS [Internet]. 2026 Jul. 14 [cited 2026 Sep. 7];97(2):1361. Available from: https://ekonomiaisrodowisko.pl/journal/article/view/1361