Geodesic
Properties of single-particle excitation spectrum for a~normal Fermi system at low temperatures
Teoretičeskaâ i matematičeskaâ fizika, Tome 7 (1971) no. 2, pp. 262-270

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A study is made of the properties of the single-particle excitation spectrum of a normal Fermi system at low temperatures. It is shown that in the immediate neighborhood of the Fermi surface, $|p-p_F|p_F^3\ll m^2\theta^2\alpha^2$, the maxima of the spectral density are strongly smoothed out. 
@article{TMF_1971_7_2_a10,
     author = {V. D. Ozrin},
     title = {Properties of single-particle excitation spectrum for a~normal {Fermi} system at low temperatures},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {262--270},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1971_7_2_a10/}
}
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V. D. Ozrin. Properties of single-particle excitation spectrum for a~normal Fermi system at low temperatures. Teoretičeskaâ i matematičeskaâ fizika, Tome 7 (1971) no. 2, pp. 262-270. http://geodesic.mathdoc.fr/item/TMF_1971_7_2_a10/