1. J. D. Bjorken:Phys. Rev.,179, 1547 (1969).
2. R. P. Feynman:Phys. Rev. Lett.,23, 1415 (1969).
3. For a detailed discussion of this calculation as well as for a thorough review of all the theories that have been mentioned, see:C. H. Llewellyn-Smith:Introduction to highly inelastic lepton scattering and related processes, CERN Pub. TH 1188;
4. L. S. Brown:Causality in electroproduction at high energy, inLectures Given at the Summer Institute for Theoretical Physics, is a slightly older reference.
5. The following references would constitute a reasonably complete listing for the experimental data mentioned in this paper:L. W. Mo:Inelastic electron-proton scattering, lecture delivered at theStony Brook Conference on High-Energy Collisions, edited byC. N. Yang (New York, 1969);