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The observation by Klauder that in the space of the a = (1/√2) (p + iq) variables, the Feynman integral can be defined in terms of a Gaussian measure, forms the basis of a presentation of the Feynman formulation of nonrelativistic quantum mechanics. The extension of this formulation to the case of a Bose field is sketched.
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Silvan S. Schweber (1962) studied this question.
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