1. M. Lewin , in Handbook of Fiber Science and Technology, Chemical Processing of Fibers and Fabrics, Fundamentals and Preparation, ed. M. Lewin and S. B. Sello, Marcel Dekker, Inc., New York, 1984, vol. 1, Part B, ch. 2
2. V. Lorås , in Pulp and Paper, ed. J. P. Casey, John Wiley & Sons, Inc., New York, 1980, vol. I, ch. 5