67.  F. Fahma, I. Febiyanti, N. Lisdayana, Y.W. Sari, D. Noviana, M. Yunus,G.T.M. Kadja, A. Kusumaatmaja. “Production of Polyvinyl Alcohol–Alginate–Nanocellulose Fibers”. Starch, 74(5-6), 2100032 (2002).

67.  F. Fahma, I. Febiyanti, N. Lisdayana, Y.W. Sari, D. Noviana, M. Yunus,G.T.M. Kadja, A. Kusumaatmaja. “Production of Polyvinyl Alcohol–Alginate–Nanocellulose Fibers“. Starch, 74(5-6), 2100032 (2002).