1. Šterzl, J., Immunological Conference of Czechoslovak Academy of Science (Nov. 29–Dec. 1, 1954); Fol. Biol., 1, 193 (1955).
2. Šterzl, J., and Trnka, Z., Nature, 179, 918 (1957).
3. Mitchison, N. A., Fol. Biol., 3, 72 (1957).
4. Dixon, J. F., and Weigle, O. W., J. Exp. Med., 105, 75 (1957).
5. Dixon, J. F., and Weigle, O. W., Fed. Proc., 16, 411 (1957).