U. A. Daulay, B. N. Mustofa, A. Purwoko, F. R. Pahlevi, R. Sari, and Ridwan, “Physiological Response of Sumatran Elephant (Elephas Maximus Sumatranus) to Land Cover Changes at TWA Holiday Resort, North Sumatra”, J. Sylva Indonesiana, vol. 9, no. 02, pp. 179–188, Aug. 2026.