מערכת אימד
- Moll C. (2015) Baldrian und Hopfen Zeigen Synergistisches Wirkprinzip. Phytokompass 2:12-14
- Koetter U et al. (2007) A Randomized, Double Blind, Placebo- Controlled, Prospective Clinical Study to Demonstrate Clinical Efficacy of a Fixed Valerian Hops Extract Combination (Ze 91019) in Patients Suffering from Non- Organic Sleep Disorder. Phytotherpy Research 9:847-851