Kopp, A., Niedermeier, J., Nagel, A., Bernthaler, T. and Schneider, G.. "Cryo ion polishing and high-resolution electron microscopy on a layered PEM composite of an automotive fuel cell" Practical Metallography, vol. 59, no. 8-9, 2022, pp. 475-487. https://doi.org/10.1515/pm-2022-0050 © 2022 Walter de Gruyter GmbH, Berlin/Boston, Germany