1. Allen HC. Materia medica of the nosodes. Reprinted ed. New Delhi: B Jain Publishers; 1988.
2. Archivfür die homöopathischeHeilkunst. 3 rd ed. Leipzig. 13; 1833. p. 163-87.
3. Verma PN, Vaid I. Encyclopedia of Homoeopathic Pharmacopoeia. Vol. 2. New Delhi. B. Jain publishers. 1997.
4. Allen TF. The encyclopedia of pure materia medica. Vol 8. New Delhi: B. Jain Publishers; 1988. p. 164.