Firmansyah R, Zahraini DE, F VI, Alfadilullah A, Hartono RA. Air Pollution Index as a Representation of Negative Externalities in Indonesia’s Major Cities. IJDE [Internet]. 2025 Apr. 10 [cited 2026 Aug. 8];1(2):78-95. Available from: https://journal.karyarisetnusantara.com/index.php/ijde/article/view/42