@article{PismaZhETF.26.180,
    title = {Width of the spectrum of nearly-harmonic self-oscillating systems},
    author = {Klimontovich, Yu. L.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {26},
    issue = {3},
    pages = {180},
    year = {1977},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20849.shtml},
}