“A Herbal Combination of Rhubarb Root and Fennel Seed Extract Alleviates Functional Constipation and Modulates Gut Microbiota in Adults: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial”. Journal of Clinical Nutrition and Food Science, vol. 7, no. 1, Oct. 2024, pp. 40-47, https://doi.org/10.5281/zenodo.22339468.