1. P. Å. Albertsson, “Partition of Cell Particles and Macromolecules,” Almqvist and Wiksell Co., Stockholm and John Wiley and Son Inc., New York, 1971.
2. E. J. Verwey and J. Th. G. Overbeek, “Theory of Stability of Lyophobic Colloids,” Elesevier Publishing Co., Amsterdam, 1948.