van Balen, B., and A. Marhadi. “A Breeding Record of the Pink-Necked Fruit Dove <em>Ptilinopus porphyreus</em&gt; In Java”. KUKILA, Vol. 4, no. 3-4, 1, pp. 145-6, https://kukila.org/index.php/KKL/article/view/66.