1. Ferley JP, Zmirou D, D'Adhemar D, Balducci F. A controlled evaluation of a homoeopathic preparation in the treatment of influenza-like syndromes. Br J Clin Pharmacol. 1989;27(3):329-335.

2. Reilly DT, Taylor MA, McSharry C, Aitchison T. Is homoeopathy a placebo response? Controlled trial of homoeopathic potency, with pollen in hayfever as model. Lancet. 1986;2(8512):881-886.

3. Linde K, Clausius N, Ramirez, et al. Are the clinical effects of homeopathy placebo effects? A meta-analysis of placebo-controlled trials. Lancet. 1997;350(9081):834-843.

Additional References
Wagner H, Wiesenauer M. Phytotherapie and Pflazliche Homoopathika. Fischer-Verlag. Jena, New York. 1995.

Boericke, W. Homeopathic Materia Medica with Repertory, 9th Edition. Boericke and Runyon. Philadelphia, Pennsylvania. 1927.

Clarke, JH. The Prescriber. The CW Daniel Company. Essex, United Kingdom. 1987.

Johnson, J. Homeopathic Family Guide. Boericke & Hahnemann Publishing House. Philadelphia, Pennsylvania. 1886.