Olaru, N., L. Olaru, C. Vasile, and P. Ander. “Surface Modified Cellulose Obtained by Acetylation Without Solvents of Bleached and Unbleached Kraft Pulps”. Polimery, vol. 56, no. 11-12, Dec. 2011, pp. 834-40, https://ichp.vot.pl/index.php/p/article/view/974.