1. Adams, M.H. and Hendee, E.D. (1945) : Methods for the production of the alpha and theta toxins of Clostridium welchii. J. Immunol., 51, 249-256.
2. Gladstone, G.P. and Fildes, P. (1940) : A simple culture medium for general use without meat extract or peptone. Brit. J. Exper. Path., 21, 161-173.
3. Gooder, H. and Gehring, L.B. (1954) : Inhibition by cystine of lecithinase (α-toxin) production in Clostridium welchii (perfringens) PB6K. Nature, London, 174, 1054-1055.
4. Logan, M.A., Tytell, A.A., Danielson, I. and Griner, A. (1945) : Production of Clostridium perfringens alpha toxin. J. Immunol., 51, 317-328.
5. Macfarlane, M.G. and Knight, B.C.J.G. (1941) : The biochemistry of bacterial toxins. I. The lecithinase activity of Clostridium welchii toxins. Biochem. J., 35, 884-902.