Cottrell IW, Kang KS, Kovacs P (1980) Handbook of Water-Soluble Gums and Resins, McGraw-Hill Book Company, Chapter 2, New York
Frangou SA, Morris ER, Rees DA, Richardson, RK, Ross-Murphy SB (1982) Molecular origin of xanthan solution rheology: Effects of urea on chain conformation and interactions . J Polym Sci: Polymer Lett Ed 20: 531-538