1. Davidson, J. N., in The molecular basis of neoplasia, The University of Texas, M. D. Anderson Hospital and Tumor Institute 15th Annual Symposium on Fundamental Cancer Research, The University of Texas Press, Austin, Texas, 1962, p. 420.
2. Potter, V. R., in The molecular basis of neoplasia, The University of Texas, M. D. Anderson Hospital and Tumor Institute 15th Annual Symposium on Fundamental Cancer Research, The University of Texas Press, Austin, Texas, 1962, p. 367.