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16. Wojakowski, J.: “Real Air Testing in Real Time”, June 2005, PPP, Kansas DOT, Topeka, Kansas, USA, 21 pages

17. Distlehorst, J. & Kurgan, G.J.: Development of a precision statement for determining the air void characteristics of fresh concrete using the Air Void Analyzer”, 2006, Kansas Department of Transportation, Topeka, Kansas, USA

18. Germann Instruments: “AVA models between 1986 to 2010”, 2011, Copenhagen, Denmark, 7 pages

19. Petersen, C.G.: “Air Void Analysis for Fresh Concrete, Latest Advances”, Ninth ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete, Seville, Spain, October 13-17, 2009, 12 pages

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21. QI YANG: “Stability of air bubbles in fresh concrete”, Department of Civil and Environmental Engineering Division of Building Technology Building Materials. Chalmers University ff Technology, Master’s Thesis 2012:99, Göteborg, Sweden 2012

22. Sovannsathya Rath, Nipat Puthipad, Anuwat Attachaiyawuth and Masahiro Ouchi, “Critical Size of Entrained Air to Stability of Air Volume in Mortar of SCC at Fresh Stage”. Japan Concrete Institute, Journal of Advance Concrete Technology, volume 15, pp. 29-37, 2017.

23. Nipat Puthipad, “Effects of Entrained-air Size Distribution and Fly Ash on Self-compactability and Air Volumetric-stability of Fresh Concrete”, Department of Engineering, Kochi University of Technology, Kochi, Japan, 2018.