T. T. Thai, T. D. Nguyen, T. T. T. Nguyen, G. V. Pham, D. L. Tran and A. S. Nguyen, Effect of Polypyrrole on the Electrical, Dielectric and Mechanical Properties of Waterborne Epoxy Coatings, Comm. Phys. 30 (2020) 11. DOI: https://doi.org/10.15625/0868-3166/30/1/14582.