4Kristina Jardeby,Ulf Germgard,Bjorn Kreutz,et al.Effect of pulp composition on the characteristics of residuals in CMC made from such pulps[J].Cellulose,2005,60:259-267.
5Floyd F-LHO,Daniel W Klosiewicz.Proton nuclear magnetic resonance spectrometry for determination of substituents and their distribution in carboxymethylcellulose[J].Anal Chem,1980,52:913-916.