1. 1) Adhesion and Adhesives fundamentals and plactice (Society of Chemical Ind. London (1954))
2. 2) Adhesion and Adhesive p.69
3. J. H. de Boer: Trans. Faraday Society p.32, Oct.1936
4. 3) Adhesion and Adhesive p.22 W. D. Harkins etc.: J. Chem. Physics, 1942
5. 4) Adhdsion and Adhesive, p.60