Birski, Ł., Słaby, E., Wirth, R., Koch-Müller, M., Simon, K., Wudarska, A., Götze, J., Lepland, A., Hofmann, A., Kuras, A. (2019): Archaean phosphates: a case study of transformation processes in apatite from the Barberton greenstone belt. - Contributions to Mineralogy and Petrology, 174, 25.https://doi.org/10.1007/s00410-019-1560-z