- Topical comfrey extract: Study confirms rapid effectiveness in myalgias due to overstressing or acute blunt traumas2012 | Second Faculty of Medicine, First Faculty of Medicine, Faculty of Physical Education and Sport
- Tolerability and effectiveness of an antitrauma cream with comfrey herb extract in pediatric use with application on intact and on broken skin2018 | Publication without faculty affiliation
- Symphytum officinale L. - Common Comfrey2010 | Central Library of Charles University
- Comfrey in the Therapy of Ankle Distorsion +12005 | Second Faculty of Medicine, First Faculty of Medicine, Faculty of Physical Education and Sport
- Efficacy and safety of topically applied Symphytum herb extract cream in the treatment of ankle distortion: Results of a randomized controlled clinical double blind study2004 | Second Faculty of Medicine, First Faculty of Medicine, Faculty of Physical Education and Sport
- Wound healing effects of a Symphytum herb extract cream (Symphytum x uplandicum Nyman): Results of a randomized, controlled double-blind study2007 | Second Faculty of Medicine
- Topical symphytum herb concentrate cream against myalgia: a randomized controlled double-blind clinical study2005 | Second Faculty of Medicine, First Faculty of Medicine, Faculty of Physical Education and Sport
- Efficacy and safety of symphytum herb extract cream in the treatment of pressure ulcers2014 | Second Faculty of Medicine, First Faculty of Medicine, Faculty of Physical Education and Sport
- Randomized Double-Blind Study: Wound-Healing Effects of a Symphytum Herb Extract Cream (Symphytum x uplandicum NYMAN) in Children2012 | Second Faculty of Medicine, First Faculty of Medicine, Faculty of Physical Education and Sport