N.T.T. Nguyen, N.Q. Pham, C.M. Pham, C.N. Dinh, A.K. Tran, M.H. Nguyen, P.T.K. Le, K.A. Le, V.C. Tran, Synthesis of Cellulose Aerogels from Coir Fibers via a NaOH/Urea Method for Methylene-blue Adsorption, Chemical Engineering Transactions. 89 (2021) 565-570. doi:10.3303/CET2189095.