1.
Gaby Kressel, Janina Willers, Heike Kohrs, Andrea Zimmermann, Stephan Klement, Angelika Dienel, Andreas Hahn. Effects of Opuntia ficus-indica flower extract WS 1261 on mental and psychic function in subsyndromal fatigue – A pilot study. ijp [Internet]. 2016 Dec. 31 [cited 2024 Jun. 21];8(4):558-66. Available from: https://ijp.arjournals.org/index.php/ijp/article/view/504