A. G. Rakoch, G. Henrion, V. L. Kovalyov, A. Nominé, and I. V. Bardin, “Study of the growth kinetics, microhardness and morphology of PEO coatings formed on Al 2024 alloy in alkaline-silicate electrolytes using different current waveforms”, PSE, vol. 2, no. 13, pp. 161–164, Mar. 2013.