1. Kaplan, I. W., New Orleans Medical and Surgical Journal 94: 338 (1942).
2. Lits, F. J., Archives internationales de medecine experimentale 11: 811 (1936).
3. LUDFORD, R.J., The action of toxic substances upon the division of normal and malignant cells in vitro and in vivo., ARCHIV FUR EXPERIMENTELLE ZELLFORSCHUNG 18: 411 (1936).