@article{PismaZhETF.87.147,
    title = {Di-pion emission in heavy quarkonia decays},
    author = {Simonov, Yu. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {87},
    issue = {3},
    pages = {147},
    year = {2008},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27986.shtml},
}