Tohda, C., Matsui, M., Inada, Y., Yang, X., Kuboyama, T., Kimbara, Y., & Watari, H. (2020). Combined Treatment with Two Water Extracts of Eleutherococcus senticosus Leaf and Rhizome of Drynaria fortunei Enhances Cognitive Function: A Placebo-Controlled, Randomized, Double-Blind Study in Healthy Adults. Nutrients.

Tohda, Chihiro, Mie Matsui, Yuna Inada, Ximeng Yang, Tomoharu Kuboyama, Yoshiyuki Kimbara, i Hidetoshi Watari. "Combined Treatment With Two Water Extracts of Eleutherococcus Senticosus Leaf and Rhizome of Drynaria Fortunei Enhances Cognitive Function: A Placebo-Controlled, Randomized, Double-Blind Study in Healthy Adults." Nutrients 2020.

Tohda, Chihiro, et al. "Combined Treatment With Two Water Extracts of Eleutherococcus Senticosus Leaf and Rhizome of Drynaria Fortunei Enhances Cognitive Function: A Placebo-Controlled, Randomized, Double-Blind Study in Healthy Adults." Nutrients 2020.