Key points are not available for this paper at this time.
L. S. Freedman, Susan J. White, On the Use of Pocock and Simon's Method for Balancing Treatment Numbers over Prognostic Factors in the Controlled Clinical Trial, Biometrics, Vol. 32, No. 3 (Sep., 1976), pp. 691-694
Freedman et al. (Wed,) studied this question.