1. Anonymous, 2003. Harpagophyti radix. In: ESCOP Monographs. Thieme Press Stuttgart, New York, pp. 233–240.
2. Altmeyer, N., Garnier, R., Rosenberg, N., Geerolf, A.M., Ghaem, A., 1991. Conjunctivite, rhinite et asthme rythmes par l’exposition professionnelle a l’Harpagophytum. Societe de Medecine et d’Hygiene du Travail, pp. 289–291.
3. Etude clinique de 630 cas s’arthrose traite par le nebulisat aqueux d’Harpagophytum procumbens (Radix);Belaiche;Phytotherapy,1982
4. Effects of some iridoids from plant origin on arachidonic acid metabolism in cellular systems;Benito;Planta Med.,2000
5. Screening pharmaceutical preparations containing extracts of turmeric rhizome, artichoke leaf, devil's claw root and garlic or salmon oil for antioxidant capacity;Betancor-Fernandez;J. Pharm. Pharmacol.,2003