@article{PismaZhETF.55.477,
    title = {Spectrum of adiabatic perturbations in the universe when there are singularities in the inflaton potential},
    author = {Starobinskii, A. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {55},
    issue = {9},
    pages = {477},
    year = {1992},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19291.shtml},
}