@article{PismaZhETF.29.649,
    title = {The $\eta'$ meson as a pseudoscalar gluonium},
    author = {Vainshtein, A. I. and Zakharov, V. I. and Novikov, V. S. and Shifman, M. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {29},
    issue = {10},
    pages = {649},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22191.shtml},
}