Mays, F.R., and Walling, C., Chem. Revs.46, 191 (1950).
2.
Alfrey, T., Bohrer, J.J., and Mark, H., "Copolymerization," New York, Interscience Publishers, Inc., 1952.
3.
Flory, P.J., J. Am. Chem. Soc.59, 241 (1937).
4.
Compare Houtz, R.C., and Adkins, H., J. Am. Chem. Soc.55, 1609 (1933 ) ; Carlin, R.B. , and Shakespeare, N.E., J. Am. Chem. Soc.68, 876 (1946) ; Alfrey, T., and Bandel, D., J. Polymer Sci. (in press) ; Smets , G., and Claessen, M., J. Polymer Sci. 8, 289 (1952) ; Roland, J.R., and Richards, L.M., J. Polymer Sci. 9, 61 (1952).