Geodesic
Alpha representation and spectral properties of multiparton functions
Teoretičeskaâ i matematičeskaâ fizika, Tome 61 (1984) no. 2, pp. 284-292

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By means of parametric representation for Feynman integrals it is shown that the functions $F(x_1,\ldots,x_k)$ and $\varphi(x_1,\ldots,x_k)$, whose generalized moments are proportional to the reduced matrix elements of the k-particle composite operators, possess the spectral properties needed for their parton interpretation. 
@article{TMF_1984_61_2_a9,
     author = {A. V. Radyushkin},
     title = {Alpha representation and spectral properties of multiparton functions},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {284--292},
     publisher = {mathdoc},
     volume = {61},
     number = {2},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1984_61_2_a9/}
}
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A. V. Radyushkin. Alpha representation and spectral properties of multiparton functions. Teoretičeskaâ i matematičeskaâ fizika, Tome 61 (1984) no. 2, pp. 284-292. http://geodesic.mathdoc.fr/item/TMF_1984_61_2_a9/