@article{PismaZhETF.38.550,
    title = {Sturm spectral representations of Green's functions in the theory of many- fermion systems},
    author = {Sherstyuk, A. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {38},
    issue = {11},
    pages = {550},
    year = {1983},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22699.shtml},
}