1. A. Couper, in Vol. IXA of Physical Methods of Chemistry, edited by B. W. Rossiter and R. C. Baetzold, Investigations of Surfaces and Interfaces-Part A (Wiley, New York, 1993), p. 1.
2. A. W. Adamson, Physical Chemistry of Surfaces, 4th ed. (Wiley, New York, 1982), p. 4.
3. Reference [1] is a good introduction to techniques of liquid surface tension measurement; Ref. [5] deals specifically with polymers.
4. W. A. Zisman, in Contact Angle, Wettability, and Adhesion, Advances in Chemistry Series No. 43, edited by F. M. Fowkes (American Chemical Society, Washington, D.C., 1964), p. 1.
5. S. Wu, Polymer Interface and Adhesion (Dekker, New York, 1982).