WINARNI, Nurul L.; WIJOYO, Indartono Sosro. Birds as provider of ecosystem services at Bukit Barisan Selatan National Park, Indonesia. Journal of Indonesian Natural History, [S.l.], v. 2, n. 2, p. 17-26, dec. 2014. Available at: <http://jinh.fmipa.unand.ac.id/index.php/jinh/article/view/37>. Date accessed: 16 dec. 2018.