Yoga, M. Rafi Prima. “Analisis Tren Konsentrasi Karbon Dioksida (CO₂) Di Mauna Loa Menggunakan Model Exponential Smoothing State Space (ETS)”. Maliki Interdisciplinary Journal, vol. 4, no. 6, Feb. 2026, pp. 1548-60, https://urj.uin-malang.ac.id/index.php/mij/article/view/25065.