Naidenko, E. V., S. V. Makarov, E. A. Pokrovskaya, and A. M. Nikulin. “MODIFICATION OF CHITOSAN BY THIOUREA DIOXIDE”. ChemChemTech, Vol. 64, no. 1, Jan. 2021, pp. 73-78, doi:10.6060/ivkkt.20216401.6282.