Izdebski, A., Czerwiński, S., Jankowiak, M., Danielewski, M., Fiołna, S., Gromig, R., Guzowski, P., Haghipour, N., Hajdas, I., Kołaczek, P., Lamentowicz, M., Marcisz, K., Niebieszczański, J., Sankiewicz, P., Wagner, B. (2025). Unbalanced social–ecological acceleration led to state formation failure in early medieval Poland. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.2409056122