Wheeler, J. M., Curran, J. A., & Shrestha, S. (2012). Microstructure and multi-scale mechanical behavior of hard anodized and plasma electrolytic oxidation (PEO) coatings on aluminum alloy 5052. Surface and Coatings Technology, 207, 480-488. https://doi.org/10.1016/j.surfcoat.2012.07.056