1. Variations of Surface Tension with Body and Surface Concentrations
2. 2Eugene Jahnke, and Fritz Emde , Tables of Functions with Formulae and Curves , 4th ed. , p.22 . Dover Publications, Inc., New York, 1945 . 22 pp.
3. 3Samuel Glasstone , Introduction to Electrochemistry , p.139 . D. Van Nostrand Co., Inc., New York, 1942 . 139 pp.