Referenze:
- https://www.msdmanuals.com/it/professionale/malattie-neurologiche/disturbi-del-sonno-e-insonnia/disturbi-del-ritmo-circadiano-del-sonno
- https://www.healthline.com/nutrition/sleep-aids
- advancednaturalwellness.net/2011/01/natural-remedies-for-insomnia
- https://www.winchesterhospital.org/health-library/article?id=21249
- https://www.tandfonline.com/doi/abs/10.1080/00325481.1986.11699285