@article{PismaZhETF.36.96,
    title = {Radially excited pseudoscalar states and the problem of the l(1440) meson},
    author = {Filippov, A. T.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {36},
    issue = {3},
    pages = {96},
    year = {1982},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20118.shtml},
}