Iqbal, M., D. Mulyawati, M. S. Fujita, F. Hua, and B. Zetra. “A Breeding Record of the Rufous-Bellied Eagle <em>Lophotriorchis (Hieraaetus) Kienerii </em&gt;In Sumatra”. KUKILA, Vol. 15, 1, pp. 75-79, https://kukila.org/index.php/KKL/article/view/259.