Forsch, K., Schöning, V., Assmann, G. M., Moser, C., Siewert, B., Butterweck, V., & Drewe, J. (2019). In vitro hepatotoxicity of Petasites hybridus extract (Ze 339) depends on the concentration, the cytochrome activity of the cell system, and the species used. Phytother Res.

Forsch, Kristina, Verena Schöning, Greta Marie Assmann, Christin Moser, Beate Siewert, Veronika Butterweck, e Jürgen Drewe. "In Vitro Hepatotoxicity of Petasites Hybridus Extract (Ze 339) Depends On the Concentration, the Cytochrome Activity of the Cell System, and the Species Used." Phytother Res 2019.

Forsch, Kristina, et al. "In Vitro Hepatotoxicity of Petasites Hybridus Extract (Ze 339) Depends On the Concentration, the Cytochrome Activity of the Cell System, and the Species Used." Phytother Res 2019.