1. Title: Sesquiterpene constituents in Petasites hybridus. Author(s): Saritas, Yucel, von Reuss, Stephan H, Konig, Wilfried A Source: Phytochemistry Volume: 59 Issue: 8 Pages: 795-803 Published: 2002
2. Title: Identification and characterization of inhibitors of peptido-leukotriene-synthesis from Petasites hybridus. Author(s): Bickel, D, Roder, T, Bestmann, H J, et al. Source: Planta Med Volume: 60 Issue: 4 Pages: 318-22 Published: 1994