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Riley, D. S., Lizogub, V. G., Heger, M., Funk, P., Mueller, H., & Lehmacher, W. (2019). Treatment with EPs 7630, a Pelargonium sidoides root extract, is effective and safe in patients with the common cold: results from a randomized, double blind, placebo-controlled clinical trial. Integr. Med., 18(1), 42-51. PMC6601435PMID31341433
Jekabsone, A., Sile, I., Cochis, A., Makrecka-Kuka, M., Laucaityte, G., Makarova, E., … & Baniene, R. (2019). Investigation of Antibacterial and Antiinflammatory Activities of Proanthocyanidins from Pelargonium sidoides DC Root Extract. Nutrients, 11(11), 2829. doi:10.3390/nu11112829PMC6893413PMID31752295