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An abstract of these results was presented to the International Congress of Mathematicians, Moscow, August 1966 under the title: Eigenfunction expansions of some self-adjoint operators.
This work was supported by the U.S. Atomic Energy Commission and by the Courant Institute of Mathematical Sciences where the paper was redacted under Air Force Office of Scientific Research Grant AF-AFOSR-684-64.
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Pincus, J.D. Commutators and systems of singular integral equations. I. Acta Math. 121, 219–249 (1968). https://doi.org/10.1007/BF02391914
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DOI: https://doi.org/10.1007/BF02391914