1. Warden, C. J. H. and L. A. Waddell. 1884. Calcutta, Bengal Secretarial Press. 76 p.
2. Dixson, T. 1886-7. Australas. Med. Gaz. 6: 155.
3. Stillmark, H. Inaug. Diss. Dorpat, E. J. Karow. 1888. Cited by Osborne, T. R., The Vegetable Proteins. Longmans, Green and Co., New York. 1909.
4. Ehrlich, P. 1891. Deutsch. Med. Wochenschr. 17: 976.
5. Landsteiner, K. and H. Raubitschek. 1907. Centralb. Bakt.45: 660.