26. R.E.M. Sihite, F. Fahma, I. Sailah, M. Yunus, A. Kusumaatmaja, R.R. Mukti, G.T.M. Kadja. “Production and characterization of PVA/alginate composite filament with cellulose from oil palm empty fruit bunches”. IOP Conference Series: Earth and Environmental Science, 472 (1), 012015. (2020).