Footnotes
For an excellent account and numerous references to the conformal group see,e.g.,S. Ferrara, R. Gatto andA. F. Grillo:Springer Tracts in Modern Physics, Vol.67 (1973).
G. Mack andA. Salam:Ann. of Phys.,53, 174 (1969);S. Ferrara, R. Gatto andA. F. Grillo:Nucl. Phys.,34 B, 349 (1971).
H. P. Dürr andP. Du T. van der Merwe: Max Planck preprint (Febr. 1974).
P. Du T. van der Merwe: preprint (1974).
C. J. Isham, A. Salam andJ. Strathdee:Phys. Lett.,31 B, 300 (1970).
W. Heisenberg:Introduction to the Unified Field Theory of Elementary Particles (New York, N. Y., 1966).
F. Gürsey:Nuovo Cimento,3, 988 (1956).
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van der Merwe, P.D.T. Conformally covariant derivatives without auxiliary fields. Lett. Nuovo Cimento 12, 214–216 (1975). https://doi.org/10.1007/BF02784799
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DOI: https://doi.org/10.1007/BF02784799